Update to the 2014 New York City Energy Conservation Code 2016 Full Energy...2016/12/07 · Energy...

Update to the 2014 New York City Energy Conservation Code

Gina L. Bocra, AIA, LEED AP BD+C, ID+C

Chief Sustainability Officer

Emily Hoffman, PE, CEM, LEED AP

Director of Energy Code Compliance

build safe | live safe 2

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International Copyright laws. Reproduction,

distribution, display and use of the presentation

without written permission of the speaker is

prohibited.

© 2016 New York City Department of Buildings

The NYC Department of Buildings is a registered Provider with The

American Institute of Architects Continuing Education Systems

(AIA/CES). Credit earned on completion of this program will be reported

to AIA/CES for AIA members. Certificates of Completion for both

members and non-AIA members are available upon request.

This program is registered with the AIA/CES for continuing professional

education. As such, it does not include content that may be deemed or

constructed to be an approval or endorsement by the AIA of any material

of construction or any method or manner of handling, using, distributing,

or dealing in any material or product.

Questions related to specific materials, methods, and services will be

addressed at the conclusion of this presentation.

Course

Description

This seminar reviews the latest changes to the 2014 NYCECC.

The course will include a summary of the substantive changes

that have been made in the move from the IECC 2009 to the IECC

2015 Residential provisions and from the IECC 2012 to the IECC

2015 Commercial provisions, the changes made by the New York

State Fire Prevention and Building Code Council, and the local

provisions added by the NYC Department of Buildings.

Learning

Objectives

At the end of this course, participants will be able to:

1. Participants will review and analyze the new structure of the NYC Energy Conservation Code

(NYCECC) that will result from current legislation at the State and the City.

2. Participants will review and analyze the substantive changes made in the IECC 2015,

changes to ASHRAE 90.1-2013, changes by the State, and local changes to the residential

and commercial provisions, along with the potential impact on energy consumption.

3. Participants will study how the energy consumption, energy efficiency and sustainability

changes of the NYCECC update impact building design requirements and what plan

examiners, inspectors and administrative persons shall look for because of these changes.

4. Participants will analyze the process of how the Energy Code shall evolve into future updates,

and their impact on energy consumption and efficiency of building material selection, building

equipment and operation and building envelope design.


Use of this Presentation LEGAL DISCLAIMER: This presentation and associated handout should not be used as

substitutes for codes and regulations. For specific requirements, please refer to the relevant laws and code provisions.

© New York City Department of Buildings 2016


• Introduction

• Upcoming Operational Impacts

• Changes in the Code

• Envelope • HVAC • Lighting • Commissioning • Modeling

• Future Legislation

Presentation Agenda


DOB Supporting Staff Committee oversight- Gus Sirakis, PE, Assistant Commissioner of Technical Affairs and Code Development, and Helen Gitelson, Executive Director of Code Development

Committee Chair and Technical Expert- Gina Bocra, RA, Chief Sustainability Officer

Committee Technical Expert and Coordinator- Emily Hoffman, PE, Director of Energy Code Compliance

Committee Administrative Coordinator- Drewpattie Kallu, Sustainability Project Manager


Overview of NYCECC

International Energy Conservation Code (IECC 2015) and ASHRAE 90.1 2013

New York State Energy Code

NYC Energy Conservation Code


Overview of NYCECC

DOB Drafts and proposals based on the NYS Energy Code

Review by DOB Legal and NYC Law Department

City Council

ADVISORY COMMITTEES

NYS

CODE


Overview of NYCECC

1. Residential Advisory Committee • 31 proposals

2. Commercial Advisory Committee • 142 proposals

3. Common reasons for rejection- • Preemption of Federal standards or rules

• Reduction in stringency

• Revisions to other codes (such as the NYC MC)


Summary and Impact of Changes Chapter 1- Administration:

94 total changes: 1. 31 changes are no substantive change (editorial in nature)

2. 14 rewording

3. 4 minor additions for clarity

4. 38 deletions (many related to new Chapters C5 and R5, which govern existing buildings)


Summary and Impact of Changes Residential Chapters R2 through R5:

282 total changes: 1. 15 Administrative changes

2. 21 New definitions

3. 70 rewording changes

4. 52 deletions (definitions, tropical zone requirements, vapor barrier language)

5. 51 changes are not substantive changes (editorial in nature)

6. 70 New Requirements


Summary and Impact of Changes Commercial Chapters C2 through C5:



3. 36 deletions (definitions, tropical zone requirements, clarifications in lighting section)

4. 62 changes are not substantive changes (editorial in nature)



Summary and Impact of Changes Commercial Chapters C2 through C5:

248 New Requirements: 1. 211 changes are from the IECC

2. 7 changes are from NYS

3. 30 changes are from NYC A. 1 major change- air leakage testing

B. 23 minor changes- PTAC accounted for as a wall type

C. 6 neutral changes


Summary and Impact of Changes ASHRAE 90.1-2013:



3. 5 deletions (definitions)



Summary and Impact of Changes ASHRAE 90.1-2013:

206 New Requirements: 1. 180 changes are from ASHRAE

2. 26 changes are from NYC A. 2 major changes- air barrier testing, voltage drop

B. 20 minor changes - PTAC accounted for as a wall type

C. 4 neutral changes


Overview of NYCECC

Source: ACEEE


Summary and Impact of Changes State has adopted their update to the IECC 2015 and ASHRAE 90.1 2013:

1. Current commercial code is based on IECC 2012 and ASHRAE 90.1 2010. New code will result in 8.5% more energy savings.

2. Current residential code is based on IECC 2009. New code will result in about 23.5% more energy savings, including the increased stringency in the NYCECC.

3. Effective date was October 3, 2016.


Overview of NYCECC

Accessing the 2016 Codes http://www1.nyc.gov/site/buildings/codes/codes.page

Codes & References

2016 Energy Code

2014 Energy Code

2011 Energy Code

http://www1.nyc.gov/site/buildings/codes/codes.page



http://www.nyc.gov/html/dob/html/codes_and_reference_materials/nycecc_main.shtml





• New code: October 3, 2016

– Substantially completed applications

• Updated Forms

– PW1

– TR8

– EN1

Operational Impacts

build safe | live safe 22 22


PW1 – 12/14

PW1 – 10/16


Total of 25

TR8 – 12/14 TR8 – 10/16

Total of 24


2014 NYCECC

NYC Commercial Energy Code

1. 2014 NYCECC a. Based on the IECC 2012, ASHRAE 90.1

2010

b. Amended Chapter 1

c. Chapter C2- Definitions

d. Chapter C3- General Requirements

e. Chapter C4- Commercial Energy Efficiency

f. Chapter C5 and NYCRR Section 1240.4(b)- Reference Standards

2. Appendix A- ASHRAE 90.1- 2010 revisions

3. 2014 Supplement to the New York State Energy Conservation Construction Code

NYC Residential Energy Code

1. 2014 NYCECC a. Based on IECC 2009, and residential

provisions of ECCNYS 2010

b. Amended Chapter 1

c. Chapter 2- Definitions

d. Chapter 3- General Requirements

e. Chapter 4- Residential Energy Efficiency

f. Chapter 6 and NYCRR Section 1240.4(b)- Reference Standards

2. 2014 Supplement to the New York State Energy Conservation Construction Code


2016 NYCECC

Based on the 2016 NYS Energy Code, with the 2016 Supplement to the New York State Energy Conservation Construction

a. 2015 IECC

b. ASHRAE 90.1 - 2013

1. NYC’s Chapter 1- Administration

2. Chapters R2 and C2- NYC Revisions and Additions to the Definitions

3. Chapters R3 and C3- General Requirements

4. Chapters R4 and C4- Preserves LL 48 of 2010, NYC amendments to C4 in the 2014 NYCECC, plus IECC 2015 errata, and NYC specific revisions

5. Chapters R5 and C5- New chapters covering alterations, additions, and repairs


2016 NYC Energy Conservation Code

6. Chapters R6 and C6- NYC Modifications to Reference Standards

7. Appendices: – Appendix RA- Recommended Procedure for Worst-Case Testing of Atmospheric

Venting Systems under R402.4 or R405 Conditions ≤ 5ACH50

– Appendix RB- Solar-Ready Provisions – Detached one- and two-family dwellings, multiple single-family dwellings (townhouses)

– Appendix CA- NYC Modifications to ASHRAE 90.1 (LL48 of 2010, and modifications made to ASHRAE in the 2014 NYCECC)

8. New Index

9. Plus- ASHRAE 90.1 – 2013, and the modified Appendix G


Changes in the Code

• Definitions

• Envelope

• HVACR/Service Water

• Lighting

• Compliance Paths

• Modeling


New Definitions

IECC (Chapter R2)

• Basement Wall

• Circulating Hot Water System

• Climate Zone

• Continuous Air Barrier

• Continuous Insulation

• Demand Recirculation Water System

• ERI Reference Design

• Fenestration Product, Site-Built

• Historic Building

• Insulated Siding

• Rated Design

• Reroofing

• Roof Recover

• Roof Repair

• Roof Replacement

• Vertical Fenestration

• Visible Transmittance

• Whole House Mechanical Ventilation System


Retained Definitions

IECC (Chapters C2 and R2)- definitions added or modified by the State or City and retained

• Approved

• Approved Agency

• Area Weighted Average

• Code Enforcement Official

• Group R Buildings

• Professional Certification

• Project

• Registered Design Professional

• Residential Building

• Rated Design

• ERI Reference Design


Changes to the General Requirements • R303- Materials, Systems and Equipment-

– Now addresses identification of insulation performance values on insulated siding (IS). Insulated siding must use ASTM C1363 to determine thermal resistance.

– The IECC has added visible transmittance requirements for glazed fenestration (VT).

– NYS has deleted the requirements of Section 303.1.5, Fireplaces, which are now covered in R402.4.2.


R402 Building Envelope - Overview • Many small changes were made to clarify the code.

• Changes have increased the stringency of the insulation criteria.

• Visible Transmittance (VT) criteria have been added for fenestration.

• MAJOR CHANGE: IECC 2015 requires that the infiltration be tested to confirm no more than 3 ACH50, under Section R402.4.1.2. Visual testing of the air-infiltration barrier is no longer acceptable.

• MAJOR CHANGE: IECC 2015 has introduced a requirement to isolate open-air combustion fuel-burning appliances outside of the thermal envelope.


Insulation and Fenestration Criteria • Minor changes:

– IECC 2015 introduces R402.1.1 Vapor Retarder, which refers the user to Section 1405.3 of the IBC, as applicable. This reference will be edited to the NYC Building Code, but the section number is the same.

– NYS has deleted the requirements of Section 402.2.1.1 Unvented attic assemblies.

– NYS has deleted the section addressing the attachment of siding over foam sheathing, Section 402.1.5, and including Tables 402.1.5.1 and 402.1.5.2.


Insulation and Fenestration Criteria • Minor changes (continued):

– IECC 2015 has added requirements for eave baffles in Section R402.2.3.

R402.2.3 Eave Baffle.

For air-permeable insulations in

vented attics, a baffle shall be

installed adjacent to soffit and eave

vents. Baffles shall maintain an

opening equal or greater than the

size of the vent. The baffle shall

extend over the top of the attic

insulation. The baffle shall be

permitted to be any solid material.

Image taken from the North American Insulation Manufacturers

Association website.



– R402.2.4- A new exception has been added to the IECC to relieve vertical doors providing access from conditioned space to unconditioned space from meeting the insulation requirements of the surrounding opaque envelope. They may now meet the requirements for fenestration in Table R402.1.2 (U-factor 0.32).

Image taken from the US DOE Build America website.



– Section R402.2.7 has been introduced to allow for variable thickness at exterior walls requiring continuous insulation when less than 40% of the gross wall area is covered with structural sheathing (does not apply when using the UA alternative), to accommodate a consistent total sheathing thickness. The R-value reduction is limited to no more than R-3.

– A new exception allows insulation under a floor to be in contact with the topside of sheathing or continuous insulation installed on the bottom side of floor framing, if the insulation of the wall framing extends from the bottom to the top of the floor framing members for the full perimeter.

– Dynamic glazing is recognized in the IECC 2015.

Source: US DOE Building America

Solution Center



– Sunroom insulation requirements have been clarified under Section R402.2.13, which identifies the minimum R-Values required when a sunroom is isolated from the thermal envelope and encloses conditioned space (R-13 walls and R-19 ceiling). The IECC 2015 introduces an exception that allows the maximum u-factor for fenestration in these sunrooms to be 0.45 and maximum skylight u-factor to be 0.70 (more stringent than current code). Thermally isolated sunrooms that do NOT enclose conditioned space are not subject to the code.


Building Envelope Criteria • Minor changes (continued):

– IECC clarifies air leakage requirements for components in Table R402.4.1.1. The table now addresses both component criteria and installation, and includes:

– R402.4.2 Fireplaces, has been added to address fireplace doors and flue dampers.

• General Requirements

• Ceiling/attic

• Walls

• Windows, skylights and doors

• Rim joists

• Floors (including above garage and cantilevered floors)

• Crawl space walls

• Shafts, penetrations

• Narrow cavities

• Garage separation

• Recessed lighting

• Plumbing and wiring

• Shower/tub on exterior wall

• Electrical/phone box on exterior wall

• HVAC register boots

• Concealed sprinklers


Building Envelope Criteria • Minor changes (continued):

– IECC clarifies air leakage requirements for components in Table R402.4.1.1. The table now addresses both component criteria and installation, and includes:

Source: US DOE Building America

Solution Center


Sample Air Sealing Details


Building Envelope Criteria

DOES IT COMPLY?

NO!

Source: US DOE Building America Solution Center


Building Envelope Criteria

DOES IT COMPLY?

NO- IMPROPERLY SEALED!

Source for all images: US DOE Building

America Solution Center


Building Envelope – Adopt the Climate Zone 6 prescriptive requirements for NYC

• Adopt Climate Zone 6 requirements for NYC- increases the minimum performance of the envelope with more stringent insulation and window performance requirements that are required in upstate NY

– Has been analyzed for cost effectiveness by members of the Code Committee and by PNNL

– Requirements will be in place for upstate and large portions of US, showing that products and construction methods are readily available

– Will improve total performance by approximately 5%


PNNL Study on CZ6 in NYC

45


Insulation and Fenestration Criteria TABLE R402.1.2

INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa

CLIMATE

ZONE

FENESTRATION

U-FACTORb

SKYLIGHT

U-FACTORb

GLAZED

FENESTRATION

SHGCb, e

CEILING R-

VALUE

WOOD

FRAME

WALL R-

VALUEj

MASS WALL

R-VALUEi

FLOOR

R-VALUE

BASEMENTc

WALL R-

VALUE

SLABd R-

VALUE &

DEPTH

CRAWL

SPACEc

WALL R-

VALUE

2015 IECC 4 except

Marine 0.35 0.55 0.40 49 20 or 13+5h 8/13 19 10/13 10, 2 ft 10/13

2014

NYCECC 4 0.35 0.60 0.6 to 0.8 38 13 5/10 19 10/13 10, 2 ft 10/13

2016

NYCECC 4 0.32 0.55 0.40 49

20+5 or

13+10h 15/20 30 15/19 10, 4 ft 15/19

For SI: 1 foot - 304.8 mm.

a. R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which is less than the label or design thickness of the insulation, the installed

R-value of the insulation shall not be less than the R-value specified in the table.

b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. Exception: Skylights may be excluded from glazed fenestration SHGC

requirements in climate zones 1 through 3 where the SHGC for such skylights does not exceed 0.30.

c. "15/19" means R-15 continuous insulation on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. "15/19" shall be permitted to be met

with R-13 cavity insultaion on the interior basement wall plus R-5 continuous insulation on the interior or exterior of the home. "10/13" means R-10 continuous insulation on the interior

or exterior of the home or R-13 cavity insulation at the interior of the basement wall.

d. R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Climate Zones 1 through 3

for heated slabs.

e. There are no SHGC requirements in the Marine Zone.

f. Basement wall insulation is not required in warm-humid locations as defined by Figure R301.1 and Table R301.1

g. Or insulation sufficient to fill the framing cavity, R-19 minimum.

h. The first value is cavity insulation, the second value is continuous insulation, so "13+5" means R-13 cavity insulation plus R-5 continuous insulation.

i. The second R-value applies when more than half the insulation is on the interior of the mass wall.


Insulation and Fenestration Criteria

Table R402.2.6 (R402.2.5 in 2011)

STEEL-FRAME CEILING, WALL AND FLOOR INSULATION (R-VALUE)

WOOD FRAME R-

VALUE

REQUIREMENT

COLD-FORMED STEEL EQUIVALENT R-VALUEa

2011 2015 2011 2015

Steel Truss Ceilingsb

R-38 R-49 R-49 or R-38 + 3 R-38 + 5

Steel Joist Ceilingsb

R-38 R-49 R-49 in 2x4 or 2x6 or 2x8 or

2x10 must use U-Factor Table

R402.1.4*

Steel-Framed Wall, 16" on center

R-13 R-20+5 or

R13+10

R-13 + 5 or R15 + 4 or R-21

+3 or R-0 +10

R-13 + 12.7 or R-15 + 12.3

or R-19 + 11.6 or R-21 +

11.3 or R-25 + 10.9

Steel-Framed Wall, 24" on center

R-13 R20+5 or

R13+10

R-13 + 5 or R15 + 4 or R-21

+3 or R-0 +10

R-13 + 11.5 or R-15 + 10.9

or R-19 + 10.1 or R-21 +

9.7 or R-25 + 9.1

Steel Joist Floor

R-19 R-19 R-19 + 6 in 2x6 or R-19 + 12

in 2x8 or 2x10

R-19 + 6 in 2x6 or R-19 +

12 in 2x8 or 2x10

For SI: 1 inch = 25.4 mm.

a. Cavity insulation R-value is listed first, followed by continuous R-value.

b. Insulation exceeding the height of the framing shall cover the framing.

* Note added by DOB for purposes of this presentation. See R402.2.6.


Building Envelope Criteria • Air Leakage- Mandatory testing:

R402.4.1.2 Testing.

The building or dwelling unit shall be tested and verified as having an air leakage rate not exceeding five air changes per hour in Climate Zones 1 and 2, and three air changes per hour in Climate Zones 3 through 8. Testing shall be conducted in accordance with ASTM E 779 or ASTM E 1827 and reported at a pressure of 0.2 inch w.g. (50 Pascals).

Where required by the code official, testing shall be conducted by an approved third party. A written report of the results of the test shall be signed by the party conducting the test and provided to the code official. Testing shall be performed at any time after creation of all penetrations of the building thermal envelope.

– Code language includes criteria for conducting the test.

Source: Wikipedia Commons, photo by

Energuy 2015.


Requires BOTH:

Whole-house pressure test

• Testing may occur any time after creation of all building envelope penetrations

Field verification of items listed in Table R402.5.1.1

Building Thermal Envelope Section R402.4.1 – Air Leakage

Air Leakage

Rate

Climate

Zone

Test

Pressure

≤ 5 ACH 1-2 50 Pascals

≤ 3 ACH 3-8 50 Pascals

Source: US DOE


Building Envelope Criteria R402.4.4 Rooms containing fuel-burning appliances

In Climate Zones 3 through 8, where open combustion air ducts provide combustion air to open combustion fuel burning appliances, the appliances and combustion air opening shall be located outside the building thermal envelope or enclosed in a room, isolated from inside the thermal envelope. Such rooms shall be sealed and insulated in accordance with the envelope requirements of Table R402.1.2, where the walls, floors and ceilings shall meet not less than the basement wall R-value requirement. The door into the room shall be fully gasketed and any water lines and ducts in the room insulated in accordance with Section R403. The combustion air duct shall be insulated where it passes through conditioned space to a minimum of R-8.

Exceptions:

1. Direct vent appliances with both intake and exhaust pipes installed continuous to the outside.

2. Fireplaces and stoves complying with Section R402.4.2 and Section R1006 of the International Residential Code.


R403 Systems- Overview • The IECC 2015 has clarified that many of the sections are mandatory.

• Insulation requirements for hot water piping have been expanded.

• No MAJOR changes to the HVAC Systems requirements.


Tsupply = 150F

Systems Criteria • Minor changes:

– R403.2 Hot water boiler outdoor temperature setback now requires an outdoor setback control for one- or two-pipe heating systems, which lowers the boiler temperature based on the outdoor temperature.

Tsupply = 180F


Systems Criteria • Minor changes:

– IECC 2015 clarifies in R403.3.1 the duct insulation requirements to other areas of the building that are not located completely within the thermal envelope (such as unconditioned crawl spaces or garages). Ducts in these areas must be insulated to R-6 where 3 inches in diameter or greater, and R 4.2 where less than 3 inches in diameter.

– New exceptions are provided in R403.3.2 for ductwork sealing when air-impermeable foam spray, continuously welded joints and seams, or locking-type joints and seams are used for ductwork.

– IECC 2015 requires protection of piping insulation exposed to weather.

– Circulating hot-water systems now have requirements for the pumps and controls.

Source: DOE Building America Solution

Center


Systems Criteria • Minor changes (continued):

– R403.5.3 Hot water pipe insulation (Prescriptive)

Insulation for hot water pipe with a minimum thermal resistance (R-value) of R-3 shall be applied to the following:

1. Piping ¾ inch and larger in nominal diameter.

2. Piping serving more than one dwelling unit.

3. Piping located outside the conditioned space.

4. Piping from the water heater to a distribution manifold.

5. Piping located under a floor slab.

6. Buried in piping.

7. Supply and return piping in recirculation systems other than demand recirculation systems.

– R403.5.4 introduces criteria for drain water heat recovery units.


Systems Criteria • Minor changes (continued):

– The IECC now requires that every dwelling unit have ventilation that meets the Mechanical Code.

– Equipment sizing must now be determined by following ACCA Manual S based on loads calculated in Manual J.

– IECC 2015 introduces new requirements for fan efficacy for whole-house mechanical ventilation systems, such as range hoods, in-line fans, and bathroom/utility fans.

– The requirements for pools have been expanded to cover electric-powered portable spas, residential permanent pools, and residential permanent spas, with new reference standards.

– The IECC 2015 eliminated the R-value for pool covers, but NYS is retaining the R-12 requirement.


R404 Power and Lighting Systems- Overview

• The requirement for high-efficacy lamps has increased from 50% to 75%. A new exception has clarified that low-voltage lighting is exempted from the requirement.

• A new requirement for fuel gas lighting systems prohibits continuously burning pilot lights.

• The requirement for metering of dwelling units will be retained by NYC.


Piccolo Namek.


Retained Provision

• R404.2-Electrical Energy Consumption – In all buildings having individual dwelling units, provisions

shall be made to determine the electrical energy consumed by each unit by separately metering [or monitoring] individual dwelling units.


Compliance Paths- Overview • Minor changes to the Simulated Performance Alternative. The IECC now requires

documentation for permit and for C of O, similar to the current EN-1 and EN-2 requirements at DOB.

• MAJOR CHANGE: IECC 2015 has introduce the Energy Rating Index compliance path.

Source: Wikipedia Commons, image

released to the public domain by Florida

Solar Energy Center.

82 • 2009 ERI Score

76 • 2012 ERI Score

54

• 2015 ERI Score

• 2016 NYCECC


R406 Energy Rating Index- Overview

• The Energy Rating Index is a combination of a performance-based / outcome-based code. It allows designers and builders to approach the code with the same flexibility of the Simulated Performance Alternative, but it uses modeling and in-field observation to confirm that results are achieved.

– R406.2 stipulates that all Mandatory requirements of the code must be met, and the envelope must be at least as efficient as the prescriptive requirements of the IECC 2009 (NYCECC 2011).

– Energy Rating Index is based on a score between 0 and 100, with a home that purchases no net energy scoring a 0. A lower score means less energy consumption and greater savings. 100 is the score of a code-compliant home under the 2006 IECC.

– Under R406.5, Verification must be by a third-party approved agency. This approved agency uses calculation software to determine the score and testing to verify compliance.


Conventional Application

• FENESTRATION

• SKYLIGHT

• CEILING

• ENVELOPE

• FLOOR

• BASEMENT WALL

• SLAB

• HVAC

• BOILER/SWH

FAIL

FAIL

FAIL

FAIL

FAIL

FAIL

FAIL

PASS

PASS

U-0.35

U-0.60

R-38

R-13

R-19

R-10/13C

R-10/2’

23.5 SEER

95 AFUE


Conventional Application

• FENESTRATION

• SKYLIGHT

• CEILING

• ENVELOPE

• FLOOR

• BASEMENT WALL

• SLAB

• HVAC

• BOILER/SWH

FAIL

FAIL

FAIL

FAIL

FAIL

FAIL

FAIL

PASS

PASS

U-0.35

U-0.60

R-38

R-13

R-19

R-10/13C

R-10/2’

23.5 SEER

95 AFUE

ERI Compliance Path

ERI SCORE

54


ERI - Documentation

-Software Tools- • ICF International Beacon Residential

• Ekotrope HERS Module

• EnergyGauge® USA

• REM/Rate


ERI - Summary

• Index of 54 or below

– ↓ ERI score = ↑ Efficiency

• ‘Mandatory’ labeled sections in R401-R404

• Minimum Envelope Req’ - 2011 NYCECC

• “Energy Modeling” on PW1


New Appendices • Appendix RA- Recommended Procedure for Worst-

Case Testing of Atmospheric Venting Systems under R402.2 or R405 Conditions ≤ 5ACH50

– This is an informative appendix, not part of the code, and provides the guidelines for testing atmospheric venting systems for the identification of problems (checking for backdrafting when all venting appliances/equipment are on)

• Appendix RB- Solar-Ready Provisions- Detached One- And Two-Family Dwellings, Multiple Single-Family Dwellings (Townhouses)

– This appendix outlines the requirements for solar-ready provisions, which are available for adoption.


Adopt Appendix RB as Mandatory • Appendix RB- Solar-Ready Provisions- Detached One- And Two-Family Dwellings,

Multiple Single-Family Dwellings (Townhouses)

– This appendix outlines the requirements for solar-ready provisions, which are available for adoption.

– Applies to one- and two-family homes, or townhomes/brownstones only, no multifamily

– Applies to roofs with a minimum square footage of 600 Sq. Ft. with orientation between 110 degrees and 270 degrees of true north

– Exempts buildings that are shaded more than 50% of the time (modified based on committee feedback)

– Solar ready zone is at least 200 Sq. Ft., for townhomes the area can be 100 Sq. Ft. if the townhome has less than 2,000 GSF of floor area.

– Interconnection pathway, reserved electrical service space, and roof load documentation must be indicated in the drawings.

– Permanent certificate must describe the accommodations for future solar.


COMMERCIAL BUILDINGS


Compliance Paths

O

R

Prescriptiv

e Envelope Trade-off

Prescriptiv

e

Envelope Trade-off

Section 11 Appendix G

Performance

OR

OR

OR


Typical Slide Formatting

NYCECC • The content in this box will list

changes between 2014 NYCECC and 2016 NYCECC

• This presentation will not address the items that do not change between 2014 and 2016 versions

• M: When an item is mandatory

• P: When an item is prescriptive

ASHRAE • The content in this box will list

changes between ASHRAE 90.1-2010 and ASHRAE 90.1-2013

• This presentation will not address the items that do not change between 2010 and 2013 versions

• M: When an item is mandatory

• P: When an item is prescriptive


New Definitions

NYCECC (Chapter C2)

• 2016 Supplement

• 2016 Uniform Code Supplement

• 2015 International Building Code (As Amended)

• 2015 International Mechanical Code (As Amended)

• Air Curtain

• ASHRAE 90.1-2013 (As Amended)

• Wall, Above-Grade

• Boiler, Modulating

• Boiler System

• Bubble Point

• Circulating Hot Water System

• Climate Zone

• Computer Room

• Condensing Unit

• Continuous Insulation (ci)

• Daylight Responsive Control

• Fan Efficiency Grade (FEG)

• Floor Area, Net

• General Purpose Electric Motor (Subtype I)

• General Purpose Electric Motor (Subtype II)

• Greenhouse

• High Speed Door

• Historic Building

• Liner System (LS)

• Low-sloped Roof

• Low-voltage Dry-type Distribution Transformer

• Networked Guest Room Control System

• Opaque Door

• Powered Roof/Wall Ventilators

ASHRAE 90.1-2013 (Sect. 3) • Air economizer

• Air system balancing

• Baseline building design

• Baseline building performance

• Building envelope trade-off schedules and loads

• Computer room energy

• Condensing Unit

• Dedicated replacement air

• Effective panel surface

• Electric resistance

• Entrance door

• Evaporation design wet-bulb temperature

• Fan efficiency grade

• Fixed

• Gross floor area

• High efficacy lamps

• HVAC Zone

• Hydronic system balancing

• Ineffective panel surface

• IT equipment energy

• Light-to-solar gain ratio (LSG)

• Networked guest room control system

• Non-weatherized space constrained

single-package vertical unit

• Modulating boiler

• Multiscene control

• On-site Renewable Energy

• Packaged boiler

• Performance rating method

• Piping

• Power roof/wall ventilator (PRV)

• Power usage effectiveness (PUE)

• Power usage effectiveness- category 0 (PUE)


New Definitions

NYCECC (Chapter C2)

(Continued) • Radiant Heating System

• Refrigerant Dew Point

• Refrigerant Warehouse Cooler

• Refrigerant Warehouse Freezer

• Refrigeration System, Low Temperature

• Refrigeration System, Medium Temperature

• Reroofing

• Roof recover

• Roof repair

• Roof replacement

• Rooftop Monitor

• Saturated Condensing Temperature

• Small Electric Motor

• Time Switch Control

• Walk-in Cooler

• Walk-in Freezer

• Wall, Above-Grade

• Wall, Below-Grade

• Water Heater

ASHRAE 90.1-2013 (Sect. 3)

(Continued) • Power usage

effectiveness- category 1 (PUE)

• R-value

• Rating authority

• Refrigerant dew point

• Refrigeration system, low-temperature

• Refrigeration system, medium-temperature

• Regulated energy use

• Reheating

• Roof covering

• Roof recovering

• Saturated condensing temperature

• Sectional garage

• SHGC

• Small electric motor

• Unregulated energy use

• VT

• Walk-in cooler

• Walk-in freezer


Building Envelope - Overview • Major change- ASHRAE has increased stringency for both “All-other” and

“Group R” in more categories than the ECC, in most cases, aligning it with the ECC:

• Increased performance requirements for most categories of components

• Now ALL below grade walls and slabs must be insulated, either under ASHRAE or ECC

• Major change- ECC has introduced a requirement to isolate open-air combustion fuel-burning appliances outside of the thermal envelope.


Building Envelope - Overview • Major change- NYCECC will require air-leakage testing for certain

commercial buildings.

• Major change- buildings utilizing certain through-the-wall mechanical equipment must account for the thermal performance deficiency of the wall area occupied by the equipment.

Source: US Army Corps of Engineers


Building Envelope - Overview • Minor changes

• ECC has made changes only to the envelope requirements for roofs.

• ECC has introduced a new U-factor compliance calculation- C402.1.5, Component performance alternative.

• Radiant heating system panels must now be insulated with a minimum of R-3.5 facing the unconditioned area.


Building Envelope - Overview • Minor changes in the ECC-

• New sections on “Low-energy buildings” and “Equipment Buildings” have been added to the IECC to address greenhouses, buildings that are not conditioned, or buildings used to house electrical equipment. These buildings are exempt from the envelope requirements other than those listed in each section.


Quistnix



• Section C402.2.2 Roof Assembly adds clarification on R-value for tapered insulation used above deck (R-value cannot be reduced to less than that of a variation in thickness of more than 1”).

• In section, C402.2.3 Thermal Resistance of above-grade walls has new clarifications on mass-walls that prescribe the minimum heat capacity of the material, in addition to the weight of the mass.

Sourc

e: W

ikip

edia

Com

mons, photo

by

Mok9.

• Section C402.2.4 Floors now specifies installation requirements for assemblies over outdoor air or unconditioned space, with a few exceptions.



• Solid or hollow masonry constructed of clay or shale masonry units is now considered to comply with the air barrier requirements.

• Air infiltration performance requirements have been added for high-speed doors.

• The threshold for the vestibule exemption, based on lobby size, in buildings 75’ in height or greater, has been reduced from 3,000 square feet to 1,000 square feet. (NYC)

• Air curtains are allowed in lieu-of vestibules.


Pingpongping


Building Envelope: Slab-on-Grade

NYCECC • No change

ASHRAE • P: Unheated Slabs

• R-15 for 24” (All Other and Group R)

• P: Heated Slabs

• R-20 for 24” (All Other and Group R)


Building Envelope: Roof

NYCECC • P: Entirely Above Deck

– R-30 ci

ASHRAE • P: Entirely Above Deck

• R-30 ci

• P: Metal Building

• R-11 Ls now required in addition to R-19 batt, or R-25 plus R-8 in “liner system”

• P: Attic and other

• R-49

Source: US Department of Energy


Building Envelope – Opaque Elements

TABLE C402.1.3 (IECC 2015)

OPAQUE THERMAL ENVELOPE ASSEMBLY MINIMUM REQUIREMENTS, R-VALUE METHODa

Roofs Walls, above grade

Walls,

below

grade

Floors Slab-on-grade Floors Opaque

Doors

Clim

ate

Zo

ne 4

Insulation

entirely

above roof

deck

Metal

Buildingsa,b

Attic

and

other

Mass Metal

Building

Metal

framed

Wood

framed

and other

Below-

grade

walld

Masse Joist/

framing

Unheated

Slabs

Heated

Slabsf Nonswinging

2015 IECC

All O

ther

R-30ci R-19 +

R-11 LS R-38 R-9.5ci

R-13 +

R13ci

R-13 +

R-7.5ci

R-13 +

R3.8ci or

R-20

R-7.5ci R-10ci R-30 R-10 for 24"

below

R-15 for 24"

below R-4.75

2014

NYCECC R-25ci

R-19 +

R-11 LS R-38 R-9.5ci

R-13 +

R13ci

R-13 +

R-7.5ci

R-13 +

R3.8ci or

R-20

R-7.5ci R-10ci R-30 R-10 for 24"

below

R-15 for 24"

below R-4.75

ASHRAE

90.1 2013 R-30ci

R-19 +

R-11 LS or

R-25 + R-8

LS

R-49 R-9.5ci R-0 +

R-15.8ci

R-13 +

R-7.5ci

R-13 +

R3.8ci or

R-20

R-7.5ci R-14.6ci R-30 R-15 for 24

in.

R-20 for 24

in. R-2*

ASHRAE

90.1 2010 R-20ci R-13 + R-13 R-38 R-9.5ci R-19

R-13 +

R-7.5ci R-13 NR R-8.3ci R-30 NR

R-15 for 24"

below R-0.6*

2015 IECC

Gro

up

R

R-30ci R-19 +

R-11 LS R-38 R-11.4ci

R-13 +

R13ci

R-13 +

R-7.5ci

R-13 +

R3.8ci or

R-20

R-7.5ci R-10ci R-30 R-10 for 24"

below

R-15 for 24"

below R-4.75

2014

NYCECC R-25ci

R-19 +

R-11 LS R-38 R-11.4ci

R-13 +

R13ci

R-13 +

R-7.5ci

R-13 +

R3.8ci or

R-20

R-7.5ci R-10ci R-30 R-10 for 24"

below

R-15 for 24"

below R-4.75

ASHRAE

90.1 2013 R-30ci

R-19 +

R-11 LS or

R-25 + R-8

LS

R-49 R-11.4ci R-0 +

R-19ci

R-13 +

R-7.5ci

R-13 +

R3.8ci or

R-20

R-10ci R-16.7ci R-30 R-15 for 24

in.

R-20 for 24

in. R-2*

ASHRAE

90.1 2010 R-20ci R-13 + R-13 R-38 R-11.4ci R-19

R-13 +

R-7.5ci

R-13 +

R3.8ci R-7.5ci R-10.4ci R-30

R-10 for 24

in.

R-15 for 24

in. R-2*

*- expressed as U-value in ASHRAE


Building Envelope: Above-Grade Wall

NYCECC • P: New section and Table

C402.1.4.1 provides an equation and calculation factors for determining the U-factor of cold-formed steel wall assemblies.

ASHRAE


Envelope – Through-the-wall Mechanical Equipment

NYCECC – C402.1.4.2 P: When the total area of penetrations

from mechanical equipment listed in Table C403.2.3(3) exceeds 1 percent of the opaque above-grade wall area, the mechanical equipment penetration area shall be calculated as a separate wall assembly with a default U-factor of 0.5.

ASHRAE 5.5.3 P: when the total area of penetrations from through-the-wall equipment or mechanical equipment listed in Table 6.8.1-4 exceeds 1% of the opaque above-grade wall area, the mechanical equipment penetration area shall be calculated as a separate wall assembly with a default U-factor of 0.5, and compliance shall be shown with method b.


Building Envelope: Above-Grade Wall

NYCECC • P: New section C402.1.5 provides a

component performance alternative calculation for envelope compliance.

ASHRAE

A + B + C + D + E ≤ Zero

A= Sum UA differences for thermal envelope other than slabs and below-grade walls

B= Sum UA differences for slab on-grade perimeter

C= Sum UA differences for below-grade walls

D= Excess vertical glazing value

E= Excess skylight value


Envelope – Fenestration WWR

NYCECC – C402.3.1 P: 30% MAX OR

P: 40% MAX when:

– Not less than 50% net floor area in daylight zone for buildings not more than two stories above grade, or not less than 25% net floor area in daylight zone for buildings three or more stories above grade, AND

– automatic daylighting controls installed, AND

– Certain VT levels are met (>1.1*SHGC)

ASHRAE 5.5.4.2.1 P: No Change (40%) unless following Appendix G


Envelope – Fenestration Orientation

NYCECC CH C4 • No Requirement

ASHRAE – 5.5.4.5 P: Limits fenestration on East & West facing walls • AW ≤ (AT)/4 and AE≤(AT)/4 or

• AW x SHGCW≤ (AT x SHGCC)/4 and AE x SHGCE≤(AT x SHGCC)/4

• Exceptions for street level glazing,

shaded facades, existing buildings

where alterations/additions do not

increase the percentage of glazing, or

buildings where AW and AE does not

exceed 20% of the gross wall area for

each of those facades


Envelope – Fenestration Orientation


Envelope - Fenestration

Opaque Elements U-factor SHGC U-factor SHGC

More

Stringent?

Window-Wall Ratio IECC

Nonmetal Framing - Fixed U-0.38 0.40 U-0.35 0.40 ASHRAE

Nonmetal Framing - Operable U-0.45 0.40 U-0.35 0.40 ASHRAE

Metal Framing - Fixed

(curtainwall/storefront) U-0.38 0.40 U-0.42 0.40 IECC

Metal Framing - Operable

(curtainwall/storefront) U-0.45 0.40 U-0.50 0.40 IECC

Metal Framing (entrance door) U-0.77 0.40 U-0.77/U-0.68* 0.40 ASHRAE

Metal Framing - Fixed (all other) U-0.38 0.40 U-0.42 0.40 IECC

Metal Framing - Operable (all

other) U-0.45 0.40 U-0.50 0.40 IECC

Residential (ALL) U-0.5 0.40 U-0.50 0.40

Commercial (ALL) U-0.5 0.40 U-0.50 0.40

*Group R requirement

Skylight

Vertical

Glazing

2016 NYCECC

2015 IECC ASHRAE 90.1-2013

MAX - 30% MAX - 40%

MAX - 3% MAX - 3%


Envelope – Minimum Skylight Area

NYCECC – C402.4.2 • P: Skylight required when the

following are met: – Directly under roof w/ ceiling >15ft

– Space >2,500 SFQT

– Serves as office, lobby, atrium, concourse, corridor, storage, gymnasium, convention center, auto service, mfg, non-refrig warehouse, retail, distribution, transportation, workshop

– New exception if the total area minus the area in a daylight zone with vertical fenestration is less than 2,500 sq. ft.

ASHRAE – 5.5.4.2.3 • P: Skylight required when the

following are met: • Space ≥2,500 SFQT • Serves as office, lobby, atrium,

concourse, corridor, storage, gymnasium, playing area, convention center, courtroom, auto service, fire station engine room, mfg corridor/transition and bay areas, non-refrig warehouse, retail, library reading and stack areas, distribution, transportation baggage and seating areas, workshop

• Same new exception as IECC


Envelope – Daylight Area Under Skylights

NYCECC – C402.3.2 • P: Daylight zone under skylights

shall be not less than half floor area

• P: Shall provide minimum skylight area to daylight zone of either:

• Not less than 3% (if VT >= 0.40)

• Min. skylight aperture of at least 1%

• P: Daylight zone controlled by multilevel lighting controls

• See C405.2.2.3.3

• P: Haze factor >90%

ASHRAE – 5.5.4.2.3 • P: Daylight zone under skylights

shall be not less than half floor area

• P: Shall provide minimum skylight area to daylight zone of either:

• Not less than 3% (if VT >= 0.40) • Min. skylight aperture of at least 1%

• P: Daylight zone controlled by multilevel lighting controls

• See 9.4.1.5

• P: Haze value >90%


Building Envelope - Overview • Minor changes in ASHRAE-

• A whole-building leakage rate of 0.4 cfm/ft2 or less can be followed in lieu-of meeting the component performance requirements in 5.4.3.2


Envelope – Air Barrier

• Major change- Air barrier testing (ECC C402.5.1.3 and ASHRAE 5.4.3.5)

• Buildings 25,000 sq. ft. and greater, but less than 50,000 sq. ft. and less than or equal to 75’ in height must show compliance through testing in accordance with ASTM E779 (whole-building leakage rate of 0.4 cfm/ft2 or less).

• Buildings 50,000 sq. ft. and greater must test or inspect each type of unique air barrier joint or seam for continuity and defects, as per an Air Barrier Continuity Plan, or may show compliance through testing in accordance with ASTM E779.

WE WANT DETAILS!


Building Envelope Criteria C402.5.3 Rooms containing fuel-burning appliances (Mandatory)

In Climate Zones 3 through 8, where open combustion air ducts provide combustion air to open combustion fuel burning appliances, the appliances and combustion air opening shall be located outside the building thermal envelope or enclosed in a room, isolated from inside the thermal envelope. Such rooms shall be sealed and insulated in accordance with the envelope requirements of Table C402.1.3, or C402.1.4, where the walls, floors and ceilings shall meet the minimum of the below-grade wall R-Value requirement. The door into the room shall be fully gasketed and any water lines and ducts in the room insulated in accordance with Section C403. The combustion air duct shall be insulated, where it passes through conditioned space, to a minimum of R-8.

Exceptions:

1. Direct vent appliances with both intake and exhaust pipes installed continuous to the outside.

2. Fireplaces and stoves complying with Sections 901 through 905 of the New York City Mechanical Code, and Section 2111.13 of the New York City Building Code.

Source: Department of Energy, Building

America


10 MINUTE BREAK


HVAC- Overview • Major change- ASHRAE has increased the scope of the standard and now

applies to more systems and applications.

• Now regulates Refrigeration

• Many more fan requirements – efficiency, controls

• Minimum turndown for boilers/boiler plants >1 MMBTU/h

• Energy Recovery in more applications

• Major change- 2016 NYCECC has aligned many requirements with ASHRAE, although there are still some differences

• Removed the distinction between simple/complex systems

• Aligned efficiencies with ASHRAE


HVACR – Scope

NYCECC – C403.1 M: Walk-in coolers, walk-in freezers, refrigerated warehouse coolers and refrigerated warehouse freezers

ASHRAE – 6.1.1 M: Mechanical equipment serving heating, cooling, ventilating and

refrigeration needs

Source: www.energy.gov Photo by Lynn Billman, NREL.


HVAC – Scope

NYCECC – C403.1 M: Removed “simple” and “complex” system distinction

ASHRAE – 6.1.1 M: No change

Simple System Complex System

Source: Department of Energy, Building Energy Codes

University


HVAC – Minimum Efficiencies

• M: Alignment between NYCECC and ASHRAE 90.1

• Updated requirements for: • Air conditioners >65kBTU – IEER • Room Air Conditioners - CEER • Heat pumps – IEER, EER, COP • PTAC (cooling) – EER • VRF - IEER • Chillers – EER, kW/ton, COP • Open circuit cooling tower – gpm/hp • Computer room units • Evaporative condensers


HVAC – DDC Controls

NYCECC M: Not required.

ASHRAE – 6.4.3.10 M: Central scheduling of all units New buildings: • Fan system > 10 bhp • Chilled water plant > 25 tons • Hot water plant > 300 kBTU/h

Existing buildings, depends on: • Extent of alterations • System in alteration

Source: Wikipedia - Mat the w at English Wikipedia [GFDL

(http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0

(http://creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0

(http://creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia

Commons


HVAC – Auto Start Controls

NYCECC – C403.2.4.2 M: Auto start controls

• All systems > 6800 kBTU/h

ASHRAE – 6.4.3.3.3 M: Optimum start controls

• Systems > 15 kBTU/h with DDC controls


HVAC – Zone Isolation

NYCECC – C403.2.4.4 M: New, same as ASHRAE Required isolation controls Zones >25,000 SQFT or >1 floor

ASHRAE – 6.4.3.3.4 M: Same as IECC Required, no change

Figure 6-E Isolation Methods for a Central VAV System (User’s Manual – 90.1.-2007)


HVAC – Freeze protection system controls

IECC – C403.2.4.6 M: Similar to ASHRAE

Freeze protection added

Auto shut off – Outdoor Temp > 40F

ASHRAE – 6.4.3.7 M: Similar to ASHRAE. Required, no Change

Source: http://www.urecon.com/tracing/tracing_main.html


HVAC – Hot Water Reset Controls

NYCECC – C403.2.5 M: All HW boilers that supply heat through one- or two-pipe systems shall have outdoor setback control based on outdoor temperature.

ASHRAE – 6.5.4.4 P: HW systems > 300kBTU/h shall have automatic reset controls

Source: Wikipedia Source: Dept. of Energy, Building America Solutions Center Source: Wikipedia

Tsupply = 150F Tsupply = 180F


HVAC – Demand Controlled Ventilation

NYCECC – C403.2.6.1 M:

SAME as ASHRAE, Exceptions Differ

Exceptions: • Spaces with < 1200 CFM OA

• Supply air minus makeup or transfer air requirement < 1200 CFM

ASHRAE – 6.4.3.8 M: Now required in: • Classrooms, break rooms,

conference rooms • >25ppl/1000 sf and >500 SF Exceptions: • Spaces with < 750 CFM OA • >75% OA is from transfer air • Correctional cells, daycare sickrooms,

science labs, barbers, beauty and nail salons, & bowling alley seating (from ASHRAE 62.1)

Source: DOE Building Energy Codes Program


HVAC – Enclosed Parking Garage Ventilation

NYCECC – C403.2.6.2 M: Parking garages detect contaminants (i.e. CO) and modulate fans to 50% or 20% of occupied time Exceptions differ from ASHRAE

ASHRAE – 6.4.3.4.5 M: Parking garages detect contaminants (i.e. CO) and modulate fans to 50% Exceptions differ from ECC

Source: Wikipedia Commons, Image by ProjectManhattan


HVAC – Heating in Vestibules

NYCECC M: No requirement

ASHRAE – 6.4.3.9 M: Automatic controls: • Shut off – Outdoor Temp > 45F • T-stat max - 60F

Exception, • vestibules with no heating system • tempered with transfer air that

would otherwise be exhausted

Source:

https://www.energycodes.gov/sites/default/files/documents/cn_commercial_vesti

bules.pdf


HVAC – Energy recovery ventilation systems

NYCECC – C403.2.7 M: Same as ASHRAE Required on ALL ventilation systems operating 8000+hrs OR 80%+ outdoor air

ASHRAE – 6.5.6.1 P: Same as IECC

Source: Wikipedia


HVAC – Energy recovery ventilation systems

Image: Google Earth 73rd Street & 1st Ave, 8/24/16

Exhausted air source within 30’ radius of supply

air source unit shall be considered single

exhaust location.


HVAC – Kitchen Exhaust Systems

NYCECC – C403.2.8 M: NEW, Aligns with ASHRAE • Systems > 5000 CFM include one:

– Make-up air – Demand Ventilation – Exhaust ERV

ASHRAE – 6.5.7.1 P: Same as IECC Required, no changes

Source:

https://www.energycodes.gov/sites/default/files/

documents/cn_kitchen_exhaust.pdf


HVAC – Fan System Efficiency

NYCECC – C403.2.12.3 M: SAME as ASHRAE Fans > 5hp & not in packaged units • Fan Efficiency Grade (FEG) > 67

ASHRAE – 6.5.3.1.3 P: SAME as IECC

"HVAC Ventilation Exhaust" by PictorialEvidence - Own work. Licensed under CC BY-SA 3.0 via Commons -

https://commons.wikimedia.org/wiki/File:HVAC_Ventilation_Exhaust.jpg#/media/File:HVAC_Ventilation_Exhaust.j

pg


HVAC – Refrigeration equipment

NYCECC – C403.2.14 M: Similar to ASHRAE • Minimum efficiency requirements • Walk-in coolers/freezers

– Automatic Doors – Insulation (R-25/R-32) – ECM Motors – Anti-sweat heater controls – Lighting + controls

• Refrigerated display cases – Lighting controls (occ/timer) – Defrost termination – Anti-sweat heaters

ASHRAE – 6.4.5, 6.4.6 M: Similar to IECC

Source: http://energy.gov/eere/buildings/building-

technologies-office-2015-highlights

http://energy.gov/eere/buildings/building-technologies-office-2015-highlights











HVAC – Economizers

Requirements (NYCECC C403.3 & ASHRAE 6.5.1) P: Economizer requirements, regardless of compliance path • Air-side or water-side required on all fan cooled systems • Exceptions where economizers are not required:

– Processes where >25% of the air must be humidified >35F dp – Systems expected to operate < 20hrs/wk – Systems serving zones with open refrigerated casework – Systems with condenser heat recovery – High efficiency systems (ASHRAE only)

Source: www.energystar.gov


HVAC – Economizer High-Limit Shut-off

NYCECC – C403.3.3.3 M: Same as ASHRAE Allowed: • Fixed dry-bulb, TOA>65F • Fixed enthalpy w/ fixed dry-bulb • Differential enthalpy w/ fixed dry-

bulb

Not allowed: • Differential dry-bulb • Electronic enthalpy • Dew point & dry-bulb temps

ASHRAE – 6.5.1.1.3 P: Same as IECC

Source: Trane, Engineers Newsletter, Vol 44-2 “Airside economizers and

ASHRAE Standard 90.1-2013”


HVAC – Economizer Controls

NYCECC – C403.2.4.7 M: Fault Detection & Diagnostics (FDD)

• Temperature sensors (OA, RA, SA)

• Sensor Accuracy – Temperature: +/- 2% from 40-80F

– Pressure (refrigerant): 3%

• System operating status

• Independent operating controls – Compressors, economizer, fans, htg sys

• Fault reporting – bldg operator or zone t-stat

• Capability to detect – Air temp sensor failure

– Economizing or not when should or not

– Damper not modulating

– Excess OA

ASHRAE – 6.5.1.1.6 P: No FDD • Sensor Accuracy – same as ECC

Source: Dept. of Energy, BECU, PNNL-SA-120201


HVAC – Economizer Controls

IECC – C403.3.1 P: Part-load requirements for DX units

• Units with economizers > 75kBTU/h – 2-stage cooling

• All other systems – 3-stage cooling - > 65kBTU < 240kBTU

– 4-stage cooling - > 240kBTU

ASHRAE – 6.5.1.3 P: Similar to IECC

• Units with economizers > 65kBTU/h – 2-stage cooling


HVAC – Fan Control

NYCECC – C403.4.1 P: Aligns with ASHRAE Fans in hydronic and multiple zone systems must be variable flow • DX 65 MBH or more: 2-speed • CHW > ¼ hp: Variable speed • Fans 1/12 – 1hp: ECM or 70% eff.

ASHRAE – 6.5.3.2.1 P: Same as IECC

Source: Department of Energy, Building Energy Codes Program

Source: https://en.wikipedia.org/wiki/Variable-frequency_drive


HVAC – Boiler Turndown

NYCECC – C403.4.2.5 P: Aligns with ASHRAE Turndown requirements for boilers required for > 1MMBTU/h Requirement shall be met through: • Multiple single-input boilers • 1 or more modulating boilers • Or combination or single input &

modulating

ASHRAE – 6.5.4.1 P: Same as IECC


HVAC – Tower Flow Turndown

NYCECC P: No requirements

ASHRAE – 6.5.5.4 P: Open-circuit cooling tower on water-cooled chiller systems Minimum 50% turndown

Source: Image, Google Earth, 8/24/16


NYCECC P: No requirement

ASHRAE – 6.5.10 P: New buildings only Doors separating conditioned space from the outdoors provided with controls that within 5 minutes of the door opening: • Disable heating or reset to <55F • Disable cooling or reset to >90F

HVAC – Door switches

Source: Image, Google Earth, 8/24/16


HVAC – Guest room controls

Wikipedia Commons, photo by Loftcwyouth

• Mandatory - Hotels with > 50 guestrooms

• Captive key card system, OR

• Automatic HVAC setback controls

– +/- 4F when unoccupied

– 80F/60F when unrented


NYCECC P: No requirement

ASHRAE – 6.6 P: Alternate HVAC compliance path for data centers using power usage effectiveness (PUE) Compliance following • Mandatory provisions (6.4) • PUE1 or PUE0 < 1.36 • Breakdown of energy kW or kWh by

IT equip, power distribution losses external to IT equip, HVAC systems, and lighting

Alt. Compliance Path – Computer Rm Systems

Source: www.energy.gov


Service Water Heating – High efficiency

NYCECC – C404.2.1 P: Aligns with ASHRAE Domestic water heating systems installed in new buildings with total input >1MMBH shall be >90% Et

ASHRAE – 7.5.3 P: Same as IECC

90%

+


Service Water Heating – High efficiency

NYCECC – C404.2 M: Increased efficiency for the following: • Electric > 12kW • Oil storage > 105kBTU/h • Gas/Oil Pool heaters

ASHRAE – 7.4.2 M: Increased efficiency for the following: • Electric > 12kW • Gas/Oil storage • Gas/Oil instantaneous • Gas/Oil Pool heaters • Gas/Oil HW supply boilers


Service Water Heating – Efficient Piping

ASHRAE No requirement


Lighting- Overview • Major change- Both 2016 NYCECC and ASHRAE have reduced lighting

power densities in both the Building Area Method and the Space by Space method.

• Major change- ASHRAE has added requirements for secondary sidelighting areas.

• Major change- NYCECC has clarified that controls are within the scope of lighting alterations, and commissioning is required for lighting alterations


Lighting – Scope (Alterations)

NYCECC – C503.1 Existing building alterations trigger full code compliance when replacing >20%** of luminaires in a space

**previously 50%

ASHRAE – 9.1 Existing building alterations trigger LPD and controls requirements when replacing > 20% connected lighting load NYC does NOT have an exception for lighting within dwelling units!!! • 75% of fixtures shall be fitted for

and contain only high-efficacy lamps.


Lighting – Interior LPDs

NYCECC – C405.4.2 P: Reduced in most spaces.

Same as ASHRAE

ASHRAE – 9.5, 9.6 P: Reduced in most spaces.

Same as IECC

New Table format easily provides LPD and controls requirements

NYC has further reduced LPD in enclosed offices, open offices,

and sales areas/retail spaces in both the ECC and ASHRAE, by

about 10%.

• Enclosed office- 1.0

• Open plan offices- 0.9

• Sales area- 1.30


Lighting – NEW ASHRAE Tables


Lighting – Occupancy Sensors

NYCECC – C405.2.2.2 M: Same spaces as ASHRAE

• Auto off – within 20 min (NYC)

Warehouses sensors now required

Guestrooms – auto off (lighting + receptacles) within 20 min or keycard activated

Open Plan Offices

ASHRAE – 9.4.1 M: Same spaces as IECC

• Auto off – within 20 min

Warehouse – same as ECC

Guestrooms – same as ECC

• Separate bathroom sensor (30min) Open Plan Offices – same as ECC

Source:

http://www.gelighting.com/LightingWeb/na/solutions/industry/hospitality/wareh

ouse-lighting/overview/


Lighting – Daylighting Control

NYCECC – C405.2.3.1 M: Auto dimming controls

(no more manual option!)

New daylight zone definition

• NOT aligned with ASHRAE

Exceptions for spaces with <150W

ASHRAE – 9.4.1.1(e) M: Now mandatory!

Requires control of primary and secondary sidelighting

New daylight zone definition

• NOT aligned with IECC

Exceptions for spaces with <150W in primary or <300 W in primary & secondary. (previously < 250 SF)

Source:

http://www.nyc.gov/html/greenyc/html/tips/work.shtml


Lighting – Sidelighting Definition

2016 NYCECC

ASHRAE 90.1-2013


Lighting – Exterior Lighting Power

NYCECC – C405.5.2 P: Calculates façade exterior lighting by gross above-grade wall area

ASHRAE – 9.4.2 P: Façade exterior lighting – no change (based on illuminated wall area or length)

Added loading docks to nontradable surfaces


Escalators & Moving Walks

NYCECC – C405.9.2 M: Automatic controls to reduce speed to a minimum permitted speed (ASME A17.1/CSA B44) when not carrying occupants.

VFD regenerative drive on one-way down escalators

ASHRAE 10.4.4 M: Same as ECC

Source: NYC Dept. of Buildings, “Elevators and Escalators: Staying

Safe”


Power – Voltage Drop

NYCECC No Requirements

ASHRAE 8.4.1 M: MAX voltage drop limited to:

• 5% total for feeder conductors and branch circuit conductors combined


Power – Automatic Receptacle Control

NYCECC No Requirements

ASHRAE 8.4.2 M: Plug loads

• 50% of receptacles in private offices, conference rooms, copy rooms, break rooms, classrooms and individual workstations are controlled by automatic control device

• Permanently marked to visually differentiate

• Uniformly distributed throughout space


Electrical energy monitoring

NYCECC No requirement

ASHRAE 8.4.3 M: New Buildings > 25,000 SF

End use submetering for whole building & tenants >10,000SF: • Total electrical • HVAC systems • Interior Lighting • Exterior Lighting • Receptacle Circuits

Data made available to tenant


Whole-building energy monitoring

NYCECC No requirement

ASHRAE 10.4.5 M: Measurement devices shall be installed to monitor building use of the following provided by the utility:

• Natural gas

• Fuel oil

• Propane

• Steam

• Chilled water

• Hot water


HVAC – Additional Energy Efficiency Options

NYCECC – C406 M: Added 3 additional options, edited 3 existing options

• Efficient HVAC – 10% more than min

• Reduced LPD – 10% less than min.

• Enhanced digital lighting controls

• On-site renewable (no change)

• Dedicated OA system w/ ERV

• Reduced DHW – 60% from heat recovery or solar

ASHRAE No Requirements


HVAC – Commissioning

NYCECC – C408 M: Quality assurance process Same as NYCECC 2014, except establishes a 25kW threshold for on-site renewable energy systems required to commission

• Clarifies that DHW is included in the heating capacity

• RDP shall provide evidence of lighting functional testing

ASHRAE 6.7 M: Quality assurance process Same as NYCECC


Energy Modeling - ECB • Limited on-site renewable energy set to 5% of the design energy cost

• WWR – East/West facades meet prescriptive compliance or average rotations

• Added Fan power removal calculations

• More stringent fan controls in baseline

• Lighting controls language expanded – Added language regarding modeling controls and daylighting controls directly as controls or through

schedule adjustments

– Additional lighting controls may be modeled as reduced LPD, directly as controls, or schedule adjustment

– Additional lighting power for non-mandatory controls allowed under 9.6.3 shall not be included in budget building design


Energy Modeling – Appendix G • Performance Rating Method – Appendix G, adopted addendum bm

– Permanent baseline established at ASHRAE 90.1-2004 version

– Sets approximately 45% improvement target

• Major Changes – No longer % improvement over baseline

Sets Performance Cost Index (PCI) target for baseline

PCIt = 𝑈𝑛𝑟𝑒𝑔𝑢𝑙𝑎𝑡𝑒𝑑 $ +[𝐵𝑃𝐹 ∗𝑅𝑒𝑔𝑢𝑙𝑎𝑡𝑒𝑑 $ ]

𝑇𝑜𝑡𝑎𝑙 𝐵𝑎𝑠𝑒𝑙𝑖𝑛𝑒 ($)

Compliance indicated by PCI > PCIt

PCI = 𝑇𝑜𝑡𝑎𝑙 𝑃𝑟𝑜𝑝𝑜𝑠𝑒𝑑 ($)

𝑇𝑜𝑡𝑎𝑙 𝐵𝑎𝑠𝑒𝑙𝑖𝑛𝑒 ($)

Building Area Type

Building Performance Factor (CZ 4A)

Multifamily 0.78

Healthcare/hospital 0.57

Hotel/motel 0.62

Office 0.58

Restaurant 0.58

Retail 0.55

School 0.49

Warehouse 0.58

All others 0.58


Energy Modeling – Appendix G

• ASHRAE 90.1-2004 Values

– Envelope

– HVAC Efficiencies

– Interior LPD

– Exterior LPD


Energy Modeling – Appendix G • Appendix G, adopted addendum k

– Directs modeler to use default assemblies in Appendix A for baseline assemblies

• Appendix G, adopted addendum r – Defines hierarchy for selecting baseline HVAC systems, clarify what floors to count, and specify

building type when no one use is predominant

• Appendix G, adopted addendum z – Clarifies/modifies language on modeling of a baseline HVAC system with air-source heat pumps and

auxiliary heat

• Appendix G, adopted addendum aa – Clarifies the exception for when a conditioned space does not have to be both heated and cooled –

storage rooms, stairwells, vestibules, electrical/mechanical rooms, restrooms

• Appendix G, adopted addendum ad – Revises preheat coil requirement for systems 5 – 8 to be modeled with preheat coil with a fixed

setpoint, which eliminates any simultaneous heating and cooling

• Appendix G, adopted addendum dx – Modifies the LPD for some systems



• Set building infiltration rate 0.4 cfm/sqft

• Baseline building no longer allows the existing envelope values in alterations

• Added Fan power removal calculations

• Expanded language on:

– Lighting controls

– Computer room HVAC systems



• New Tables for Baseline Building

– WWR based on building type, not 40% max

– DHW based on building type, not fuel

– New HVAC mapping

– Additional HVAC system types


EN1 Form – Section 4 Select modeling path

White boxes – User Input

Green boxes – Automatic


EN1 Form – Section 5/5a

End use with highest and lowest savings easily identifiable

Identifying efficiency measures expedites review and inspection


EN1 Form – Section 6a

User selects building type – determines Max Glazing %


EN1 Form – Section 6a

Red Cell = Error Appendix G caps WWR per type (22% for Primary School) Skylight area = 3% max


EN1 Form – Section 6b

User selects window type U-, SHGC, VLT populate based on drop down list and modeling path


EN1 Form – Section 6c

User selects Baseline walls U-factor populates based on drop down list and modeling path


EN1 Form – Section 6d Space-by-Space

LPD populates based on drop down list and modeling path

Weighted average W/SQFT


EN1 Form – Ext Ltg Calculator

Select Zoning District

Input length or area and proposed watts – baseline wattage calculates


EN1 Form – Section 6e


EN1 Form – Section 6g


EN1 Form – Section 6i

User prompted to select system description based on ECB or Appendix G


EXISTING BUILDINGS- Overview

• The requirements covering existing buildings have been moved from Chapter 1 to a new Chapter C5. This chapter clarifies many requirements but does not increase the stringency.

– Altered portions of the building must comply with sections C502 (Additions), C503 (Alterations), and C504 (Repairs).

– Additions must either comply prescriptively or can comply through the performance path, with both the existing building and addition modeled as a whole building.

– One exception has been added clarifying that extension of ductwork from an existing system will not require testing if the ducts are less than 40’ in length.

Source: Wikipedia Commons, photo by Beyond My

Ken.


EXISTING BUILDINGS- Overview

• Changes to the requirements for Historic Buildings, C501.6, may not be enforceable in NYC, if it is not modified in the NY State Energy Law.

• A separate section, C504, has been introduced to cover repairs, which clarifies that repairs are not subject to the code under certain conditions.

• A separate section, C505, now covers change of occupancy or use. Similar to the conversion to conditioned space from unconditioned space, if not meeting the code fully, a home is allowed to comply if the modeling shows no more than 10% usage above the allowable.


The Future of the NYC Energy Code


NYC GHG Emissions Target

•30% x 2030 PlaNYC

• 80% x 2050

• 40% x 2030

One City Built to

Last


Future of the NYCECC

• OCBTL- Technical Working Group Report, released in April, 2016

• Calls for performance-based standards

• Significant increases in energy savings for both new and existing buildings


Overview of NYCECC

Source: ACEEE


Sustainability in City-owned buildings

• NYC has a LEED requirement for city-owned projects or city-funded projects

– Recently revised to LEED Gold version 4

– Also amended the law to move the city toward a low-energy building performance standard, with an energy use target of 50% less than code (Local Law 31 of 2016)


Summary

• New Code became effective on October 3, 2016

• New commercial code is approximately an 8.5% increase in energy efficiency compared to the current version, residential is a 23.5% increase.

• The ECC and ASHRAE 90.1 continue to come more and more into alignment.

• One City Built to Last initiative is likely to influence additional code updates to dramatically increase energy efficiency in future years.


Thank-you!

For more information on the NYC Energy Code:

http://www1.nyc.gov/site/buildings/codes/energy-

conservation-code.page

Energy Code Technical Questions:

[email protected] © 2016 New York City Department of Buildings

http://www1.nyc.gov/site/buildings/codes/energy-conservation-code.page






mailto:[email protected]

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