The 2012 IECC America’s Model Building Energy Code
October 30, 2011 Presentation to
ICC Sustainability Member Council
Governing Committee
Eric Lacey
Responsible Energy Codes Alliance
Responsible Energy
Codes Alliance
• A broad coalition of energy
efficiency professionals,
regional organizations,
product and equipment
manufacturers, trade
associations, and
environmental organizations
that promote the adoption
and implementation of the
most recent version of the
IECC nationwide
• Air Barrier Association of America
• Alliance to Save Energy
• American Chemistry Council
• American Council for an Energy-Efficient Economy
• Cardinal Glass Industries, Inc.
• CertainTeed Corporation
• EPS Molders Association
• Extruded Polystyrene Foam Association
• Guardian Industries Corporation
• Hogan & Hartson LLP
• Institute for Market Transformation
• Johns Manville Corporation
• Knauf Insulation
• Midwest Energy Efficiency Alliance
• National Fenestration Rating Council
• Northeast Energy Efficiency Partnerships
• North American Insulation Manufacturers Association
• Owens Corning
• Pactiv Corporation
• Polyisocyanurate Insulation Manufacturers Association
• Sierra Club
• Southeast Energy Efficiency Alliance
• Southwest Energy Efficiency Project
Why Building Energy
Codes Matter
• Share of Energy
Consumed by Major
Sectors of the
Economy (2010)
Source: U.S. Energy Information
Administration
Why Building Energy
Codes Matter
Why Building Energy
Codes Matter
• Buildings account for
70% of electricity use
• Buildings account for
38% of CO2
emissions (Source: US Green Building Council)
Residential Progress
Commercial Progress
2012 IECC Residential Improvements
Better Thermal Envelope -- Improved Insulation values
CLIMATE
ZONE CEILING
R-
VALUE
WOOD
FRAME
WALL
R-
VALUE
MASS
WALL
R-
VALUEi
FLOOR R-
VALUE
BASEMENTc
WALL
R-
VALUE
SLABd
R-
VALUE &
DEPTH
CRAWL
SPACE c
WALL
R-
VALUE
1 30 13 3/4 13 0 0 0
2 30 38 13 4/6 13 0 0 0
3 30 38 13
20 or 13+5h
5/8
8/13 19 5 / 13f 0 5 / 13
4 except
Marine 38 49
13
20 or 13+5h
5/10
8/13 19 10 / 13 10, 2ft 10 / 13
5 and
Marine 4 38 49 20 or 13+5h 13/17 30g
10 / 13
15/19 10, 2ft
10 / 13
15/19
6 49 20+5 or
13+510h 15/19 20 30g 15 / 19 10, 4ft
10 / 13
15/19
7 and 8 49
21
20+5 or
13+510h
19/21 38g 15 / 19 10, 4ft 10 / 13
15/19
Better Thermal Envelope -- Simplified and More Efficient Fenestration
CLIMATE ZONE FENESTRATION
U-FACTOR
SKYLIGHT
U-FACTOR
GLAZED
FENESTATION SHGC
1 1.20
NR 0.75 0.30 0.25
2 0.65 0.40 0.75 0.65 0.30 0.25
3 0.50 0.35 0.65 0.55 0.30 0.25
4 except Marine 0.35 0.60 0.55 NR 0.40
5 and Marine 4 0.35 0.32 0.60 0.55 NR
6 0.35 0.32 0.60 0.55 NR
7 and 8 0.35 0.32 0.60 0.55 NR
Other Improvements in
Residential Buildings
• Tighter Ducts and Objective Testing
• Tighter Homes and Objective Testing
• More Efficient Hot Water Distribution
• More Efficient Lighting
Code Consistency
2012 IECC Commercial Improvements
Better Thermal Envelope -- Improved Insulation values
• Improvements in:
– Roofs
– Walls
– Floors
– Opaque Doors
Better Thermal Envelope -- Simplified and More Efficient Fenestration
Climate Zone 1 2 3 4 -5 6 7 -8
Vertical Fenestration
U-factor
Fixed
fenestration 0.50 0.50 0.46 0.38 0.36 0.29
Operable
fenestration 0.65 0.65 0.60 0.45 0.43 0.37
Entrance
doors 1.10 0.83 0.77 0.77
0.77
0.77
SHGC
SHGC 0.25 0.25 0.25 0.40 0.40 0.45
Skylights
U-factor 0.75 0.65 0.55 0.50 0.50 0.50
SHGC 0.35 0.35 0.35 0.40 0.40 NR
Other Improvements in
Commercial Buildings
• Improved air barrier requirements
• Updated and improved equipment efficiency
• New technical upgrades
– HVAC commissioning
– Daylighting provisions
• Innovative Options (select one)
– High performance lighting
– High performance HVAC
– On-site renewables
2012 IECC Energy Savings
“[The 2012 IECC]
represents the
largest, one-step
efficiency increase
in the history of the
national model
energy code.”
U.S. Department
of Energy
Energy Savings
Energy Savings
2012 IECC Commercial
and ASHRAE 90.1-2010
• 2012 IECC commercial estimated
30% improvement over 2006
IECC commercial.
• ASHRAE 90.1-2010 site savings:
18.5% over 90.1-2007.
• States must certify to U.S. DOE by
Oct. 18, 2013 that they have
updated state code requirements
to meet or exceed 90.1-2010.
• IECC commercial chapter often
adopted as alternative to ASHRAE
90.1. DOE comparison available.
2012 IECC Residential
• Estimated 30% improvement over
2006 IECC.
• U.S. DOE issued preliminary
determination finding substantial
improvement over 2009 IECC.
• When determination is finalized,
states have 2 years to certify
review of whether state code
meets or exceeds 2012 IECC.
Energy Savings
• Alliance to Save Energy: “If all states
adopted the 2012 IECC in 2012 and
achieved full compliance by 2013 …”
– 3.5 quadrillion Btu annual energy savings by 2030.
– $40 billion annual energy cost savings by 2030.
– 200 million metric tons of carbon dioxide emissions
avoided annually by 2030.
Equivalents
– 3.5 quadrillion Btu annual
energy savings by 2030.
– $40 billion annual energy
cost savings by 2030.
– 200 million metric tons of
carbon dioxide emissions
avoided annually by 2030.
– Enough to heat 3.5 million
average homes each year
– Value of all 32 NFL teams
= $32.7 billion. (Forbes)
– Annual CO2 emissions
from 39,215,686 cars, or
– Annual CO2 emissions
from 47.4 coal fired power
plants (U.S. EPA)
RECA Resources Available
• 2012 IECC RECA
Compliance Guides
• Available on
www.reca-codes.com
• Hard copies available
directly from RECA
202-339-6366
Eric Lacey, Chairman
Responsible Energy Codes Alliance
202-339-6366
www.reca-codes.com
Thank You!
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