72% 39% 38% emissions 2 40% 30% 14% - EEBA...1. Set the stage: Building’s global role. Relics or...
Transcript of 72% 39% 38% emissions 2 40% 30% 14% - EEBA...1. Set the stage: Building’s global role. Relics or...
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US building impacts
72% electricity consumption
39% energy use
38% CO2 emissions
40% raw materials
30% waste output
14% potable water use
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US building impacts
72% electricity consumption
39% energy use
38% CO2 emissions
40% raw materials
30% waste output
14% potable water use
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LAURA BLAU AIA LEED BD&C® AP CPHC (Certified Passive House Consultant)CPHB (Certified Passive House Builder)CPHD (Certified Passive House Designer-pending) Principal BLUPATH
BLUPATH is an award winning architecture and design firm focusing on high-performance building design. blupath.us
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LEARNING OBJECTIVES1. Learn how science based conservation first strategies and
the ‘whole-building’ approach can be implemented to achieve energy efficiency, durability and health benefits in Historic buildings.
2. How to phase and apply both passive conservation strategies and active mechanical reduction strategies appropriately for historical buildings.
3. Apply case study examples of best practices and lessons learned, including hydrothermal issues particular to masonry walls in both custom historic residences and budget constrained affordable housing retrofit projects.
4. Understand possible administrative, design and construction challenges of renovating historic properties in both economically depressed and well-to-do neighborhoods.
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AGENDA1. Set the stage: Building’s global role. Relics or
Rejuvenation.
2. Describe the process of assessment to determine opportunities and constraints.
3. Explain the building science issues to be aware of using case study examples.
4. Remind us of the big picture.
5. Discussion and Q & A.
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Energy Consumption
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EFFICIENT BUILDINGS ARE LESS EXPENSIVETHAN POWER PLANTS
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THE BUILDING SECTOR OFFERS THE GREATEST OPPORTUNITIES
TO REALIZE ENERGY SAVINGS
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Passive House
Net Zero Energy
Home (ZEH)
LEED Platinum
Energy Efficiency
EPA Energy Star
American Standard
New Home
Typical New Home
Typical Existing HomeSpecific heating demand (TFA -30%) 4 story, 4 unit Multi family
75 kBtu/sq ft/yrSite energy consumptionMy Green Dinosaur< kBtu/sq ft/yr2010 = 24.0 kBtu/sf/yr2013 = 25.0 kBtu/sf/yr2014 = 36.0 kBtu/sf/yrConvert to Primary energy (factor of
2.71) 2010 = 65.0 kBtu/sf/yr2013 = 67.8 kBtu/sf/yr2014 = 97.6 kBtu/sf/yr
(humidifier added!)
Translate please!
Site Energy Consumption
WHAT'S YOUR ENERGY PROFILE???
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Passive House
Net Zero Energy
Home (ZEH)
LEED Platinum
Energy Efficiency
EPA Energy Star
American Standard
New Home
Typical New Home
Typical Existing HomePassive House – Heat demand (TFA-30%)New < 4.75 kBtu/sq ft/yrRetrofit < 8.00 kBtu/sq ft/yrPrimary Energy < 38.10 kBtu/sq ft/yr
Convert to Site energy (factor of 2.71) Primary Energy = 14.1 kBtu/sf/yr
Site energy consumption US single family1975 = 94.5 kBtu/sf/yr2009 = 105 kBtu/sf/yrMulti family2009 = 77.0 kBtu/sf/yr*2009 RECS Survey Data
Translate please!
RESNET HERS Rating Scale
BUILDING ENERGY CHALLENGE
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Air tightness
Passive House (new) < 0.6 ACH50
Passive House (Retrofit) < 1.0ACH50
EnergyStar 2.5, 3.0 = 4.0 ACH50
EnergyStar 2.0 = 5.0 ACH50
1998 Survey 1 of 100 houses < 5.0 ACH50
20 of 100 houses > 20.0 ACH50
Mean of 12,000 buildings = 29.7 ACH50
BUILDING ENERGY CHALLENGE
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Emissions Impact
BUILDING ENERGY CHALLENGE
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PASSIVE HOUSE
Emissions Impact
BUILDING ENERGY CHALLENGE
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What isPassive House?
(PassivHaus)
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Science based
Conservation focused
Better built
Cost effective=
SMART DESIGNEfficient, comfortable, healthy
ZEC - Zero Energy Capable
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SINGLE FAMILY ADDITION Philadelphia, PABluPath, ArchitectGreen Builder Green Home of the Year “Best Life Cycle Extension”
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SINGLE FAMILY RENOVATION Philadelphia, PABluPath, Architect
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SINGLE FAMILY ADDITIONPhiladelphia, PABluPath, Architect
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SINGLE FAMILY RESTORATIONPhiladelphia, PABluPath, Architect
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SINGLE FAMILY HISTORIC RENOVATIONWashington DCBluPath, Architect
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BROWNSTONE HISTORIC RENOVATIONBrooklyn, NYProspect Architecture, Architect
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GLASSWOOD PASSIVE HOUSE RETROFITPortland, OregonScott|Edwards, Architects, with Hammer and Hand
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HATZOLAH CENTRAL AMBULANCE DISPATCH CALL CENTERBrooklyn, NYAlex E Romeo, Architect / Duncan Architect, CPHC
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HIGH SCHOOL RETROFITBaesweiler, GermanyLudwig Rongen, Architect
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MULTI_FAMILY HISTORIC RETROFITMCKEESPORT YMCA, ACTION-HOUSINGPittsburgh, PAThoughtful Balance, Architect
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RENOVATION OF COUNTY HOSPITALEschwege, GermanyWilli Kirschner + Partner, Architect
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CHRIST CHURCH RETROFITHeinberg, GermanyLudwig Rongen, Architect
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Paradigm Shift
BUILDING ENVELOPES CHANGE
BUILDING SYSTEMS CHANGE
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Coffee Analogies
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Energy Star Passive House
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Standard Passive House
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Code Building
Passive House
SAVINGS
Energy Savings Over Time
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ECONOMICS OF PASSIVE HOUSERETURN ON INVESTMENT
LIFE CYCLE ANALYSISPRESENT VALUE ANALYSIS
Price of Saved Energy = (aloan * (Iadd - R)+Z)Esaved
Net Present Value (NPV) = K0 * 1- (1+p)-n
p
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BENEFITS BEYOND ENERGY SAVINGS
LONG TERM VALUE
Envelope is permanent to the buildingLess or smaller mechanical equipment
Lower O&M costs
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BENEFITS BEYOND ENERGY SAVINGS
LABOR IS LOCAL
PEOPLE POWER IS A RENEWABLE RESOURCE
Contributes to the local economy
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BENEFITS BEYOND ENERGY SAVINGS
LOWER RISK – MORE DURABLE
Studies show most envelope failures
are from air leakage andthermal bridging
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BENEFITS BEYOND ENERGY SAVINGS
HIGHER PRODUCTIVITY
More comfortable, healthier indoor air quality
higher user satisfaction
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BENEFITS BEYOND ENERGY SAVINGS
MORE FUTURE-PROOF – SURVIVABLE Mitigates issues surrounding
extreme weatherglobal energy
and material
availability, cost and scarcity
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ASSESSMENTKnow your science facts
Correct tools Prioritize
Be honest Be brave
Future-plan Future-proof
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ASSESSMENT
Relic or Rejuvenation
Fabric or Feature
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Super Insulated Air Tight Shell
Blower Door Test for Air Tightness
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Optimized Solar EnergyOrientation, wind and rain
Opportunities & Constraints
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Continuous VentilationBuilding Dynamics and Healthy IAQ
(know your science)
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Efficient AppliancesPlanned and Phased Obsolescence
Future Proof and Future Planning
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Accurate and Proven AnalysisHygrothermic Modeling and Testing
(every model has a bias)
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Passive House + Solar Array = Net Zero Energy
Plan for Future Optimization
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25 Years + 55,000 Units (2012)
(Ask us about Brussels 2015)
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Typical building Passive HouseEFFICIENT
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COMFORTABLEMinimize Disequilibrium
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Masonry moisture testing
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4” dense pack cellulose without interior vapor barrier
Green=RHRed= ⷪ F
80%RH
41 ⷪ F
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4” dense pack cellulose with smart interior vapor barrier
Green=RHRed= ⷪ F
80%RH
41 ⷪ F
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6” dense pack cellulose with smart interior vapor barrier
Green=RHRed= ⷪ F
80%RH
41 ⷪ F
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8” dense pack cellulose with smart interior vapor barrier
Green=RHRed= ⷪ F
80%RH
41 ⷪ F
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Thermal Bridge Design & Analysis
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Party wall air sealing and blower door test
Why?
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Tioga United-Home Ownership Program
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“Right-Size” the BuildingAmputation: lose the leg, save the patient
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Seal & Insulate, Use new “Smart Product”
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“Right-Size” Equipment, Be a Good Neighbor
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Nothing’s Perfect
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SINGLE FAMILY HISTORIC RENOVATIONWashington DCBluPath, Architect
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Extrapolation suggest 50% reduction
Pre construction usage = 57.5 kbtu/sf/yr
Gas, oil heat & electric AC, lights, plug load
Electric only = 19.22 kbtu/sf/yr
Post construction usage
Electric usage = 17 kbtu/sf/yr
Heat pump 2nd
& 3rd
fl, lights, plug load
(water usage increased 40%-teenage boys)Gas usage ??? kbtu/sf/yr
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Dense pack cellulose without a smart vapor barrier
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Lapping sill ?!? Exterior duct !?!
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Society Hill- History 1963- 1999
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Society Hill- 2008 and 2010Before After
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Air seal and insulate using creative details
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1st Solar PV Array on Historically Certified Residence in Philadelphia
Opt 1
Opt 2
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Precedent- 3 noisy neighboring air handlers
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What you see from the muse
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Too many systems
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Building reaches equilibrium
Based on TFA
1st year total usage = 6.29 kbtu/sf/yr
with PV generation = 3.55 kbtu/sf/yr
3rd year total usage = 5.31 kbtu/sf/yr
with PV generation = 2.57 kbtu/sf/yr
Why?
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Civic House Feasibility StudyUniversity of Pennsylvania
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Existing Passive House
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Air barrier discontinuous
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X W PHAir Tightness 20.0 ACH50 5.0 ACH50 0.6 ACH50
Windows R1 R8 R8+
Crawlspace floor R4 R53 R53
Basement slab R1 R1 R20
Basement walls R6/R4 R19/R35 R47/R21
Roof R24/32 R36/R71 R80/R82
Walls R6/R13/R19 R6/R13/R19 R32/R42/R52
ENVELOPE
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X W PHEnergy Usage
kBTU/gsf/yr 65.00 17.89 8.14Carbon emission
Lb/gsf/yr 10.00 8.00 6.00Utility Cost
$/gsf/yr $1.00 $0.27 $0.19
Savings $/yr $4,512 $ 5,573
Renovation Costs$/gsf/yr - $/sf/yr $106-129 $144-176
ENERGY USAGE
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CIVIC HOUSE LESSONS LEARNEDPH STANDARD WAS MET WITHOUT SOLAR GAIN
POOR SOLAR ORIENTATION NO FREE ENERGY = HIGHER CONSTRUCTION COSTS
SIZE AND OCCUPANCYASSEMBLY SPACE = ADDITIONAL EQUIPMENT
PROJECT SCOPEALL COSTS ARE NOT ENERGY RELATED
ACCURACY OF COST ESTIMATEUSE ESTIMATOR FAMILIAR WITH PASSIVE BUILDING METHODS AND MATERIALS
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CIVIC HOUSE LESSONS LEARNEDINSTITUTIONS HAVE NEEDS AND GOALSGOALS MAY CONFLICT WITH ACHIEVING PASSIVE HOUSE STANDARD
COMPARATIVELY SMALL ENERGY USE $8000 ANNUAL ENERGY COST
CAMPUS PLANNING GOALSBUILDING MAY BE REPLACED IN 20 YEARS
1 YEAR FINANCIAL PAYBACK ENERGY SAVINGS IS LONG TERM BENEFIT
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WHY IS PASSIVE
HOUSE GOOD FOR
BIGGER BUILDINGS?
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SURFACE TO VOLUME RATIO
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SURFACE TO VOLUME RATIOLOWER IS BETTER
6 / 1 = 6 24 / 8 = 3 96 / 64 = 1.5
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A skyline of work. One at a time.
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Thermal Components: Performance breakdown towards PH goal
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Thermal Components:How much do they cost?
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ANOTHER PERSPECTIVE ON ENERGY USE
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62Msf or 65,000 NYC apts. renovated to PASSIVE HOUSE=
A single 1.2MW Coal power plant
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62Msf or 65,000 NYC apts. renovated to PASSIVE HOUSE=
A single 1.2MW $2B Coal power plant
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60 % OF THE WORLD’S BUILDINGS WILL BE REBUILT
IN THE NEXT TWO DECADES. “That is a huge opportunity if we do it right.”
– Ed Mazria, Architecture 2030
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25-75 years between renovations
WASTED $$ MISSED opportunities
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PHIUS Passive House Institute USpassivehouse.us
PHAUS Passive House Alliance USphaus.org
PHI Passive House Institute (Germany)passiv.de/en/
iPHA International Passive House Associationpassivehouse-international.org
NAPHN North American Passive House Networknorthamericanpassivehousenetwork.com
RESOURCES
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ZERO ENERGY READY HOMES energy.gov/eere/buildings/zero-energy-ready-home
LEED Building rating systemnew.usgbc.org/leed
2000 WATT SOCIETY Global energy effectsnovatlantis.ch/en/2000-watt-society
THE CLIMATE TRUST Climate solutions for government, utilities and large businessesclimatetrust.org
RESOURCES
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WORLD CLASS SUPPLY High performance building supply, worldclasssupply.com
FOURSEVENFIVE High performance building supply, foursevenfive.com
FENTREND High performance window consultantsfentrend.com
STRUCTURESdb Design-buildstructuresdb.com
RESOURCES
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blupath.us
RESOURCES
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PATHS UP THE MOUNTAIN
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BIG PICTURE (P.S. IT’S AN EMERGENCY!)
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