passive house in ca, 2012

Top Ten Reasons to Build ‘Passive House’ in California for 2012

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Bronwyn Barry, Assoc. AIA, CPHCDirector, One Sky HomesPHCA Co-President2012

“The Passive House movement shows us what's possible with ultra-low-energy buildings. These

homes are pushing the envelope and creating an invaluable collection of case studies that

demonstrate just how dramatically energy consumption can be reduced--and how we can

meet the targets for carbon emission reductions that are needed to slow global warming. It

provides metrics and a path for implementation.” – Alex Wilson

10: It wins awards and recognition1

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The ‘Go Home’ receives USGBC 2011 Project of the Year AwardG.O Logic Homes, Belfast, Mainewww.gologichomes.com

10: It wins awards and recognition1

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R-House, Syracuse, NY wins AIA Housing Award 2011Della Valle Bernheimer and Architecture Research Officewww.d-bd.com and www.aro.netImage credits: della valle bernheimer

9: Our climate makes it easy!1

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Carbon Neutral & Net Energy +Passive Housein…. WISCONSIN!

TE Studiowww.testudio.comImage credits: tim eian

Fossil-fuel free home +Passive Housein…. ALASKA!

Thorsten Chluppwww.cchrc.orgImage credits: sam harel/newsminer

8: It’s proven to work!1

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LBNL Study monitors Ten Deep Energy Retrofits (Including two PH projects

Both found to performAS PREDICTED!

Brennan Less & Jeremy FischerLawrence Berkeley National LabsSource: http://eetd-seminars.lbl.gov/sites/eetd-seminars.lbl.gov/files/DER_LBNLPresentation_Final_Aug2011.pdf

7: It’s not far off Title-24 req’s1

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Case Study #1:

Project: Stettner ResidenceCity: Albany, CATFArea: 1,448 sfSSHD: 4.43 kBTU/sfyrACH: 0.5 - 0.7 @50Pa (tbc)

Architect: Greg Armitage, AIABuilder: Jim Allen, Construction Etc. CPHC: Heidi Stettner

Image: Heidi Stettner, 2012.

7: Case Study #1 – Albany, CA1

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Windows Walls Roof Floor Total0

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Typical T-24 Project R-value (hr.ft2°F/BTU.in)

PH Project R-value (hr.ft2°F/BTU.in)

Stettner Residence T-24 vs PH Insulation Value ComparisonData source: Bronwyn Barry, CPHC for Quantum Builders, 2010

7: Case Study #2 – San Jose, CA1

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Project: Codianne Miller ResidenceCity: San Jose, CAArea: 2,049 sf (TFA) 2,520sf (Reg)SSHD: 1.84 kBTU/sfyrACH: (not built)

Design+Build: One Sky Homes

7: Case Study #2 – San Jose, CA1

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Codianne Miller Residence, San Jose, CAOne Sky HomesData source: Bronwyn Barry, CPHC, One Sky Homes, 2012

Fndn Walls Roof Windows TOTAL:0

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T-24 (R-nom)PH (R-eff)

6: You will acquire new skills1

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Ye (for PHPP) 0.042 Btu/hr*f*F

Ye (for PHPP) 0.136 Btu/hr*f*F

Ye (for PHPP) 0.103 Btu/hr*f*F

THERM ANALYSIS:Slab Foundation StudyFor San Jose NZE project:

1: Best case:

2: Worst case: (not shown)

3. Most effective case:

Source: THERM analysis by Bronwyn Barry, CPHC, for One Sky Homes, 2012.

5: AB 32 (2020) and AIA 2030 1

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Source: http://www.edf.org/climate/AB32?s_src=ggad&s_subsrc=ab32&gclid=CJrphbG42q0CFQiBhwod03wjCg.

AB 32 requires California to lower greenhouse gas emissions to 1990 levels by 2020, the equivalent of taking approximately 28 million cars off the nation's roads. To meet reduction targets, the California Air Resources Board (CARB), the lead agency responsible for implementing the act, is following a blueprint approved in late 2008 known as the AB 32 Climate Change Scoping Plan. The plan lays out the strategy and a comprehensive set of actions including:

Expanding and strengthening energy efficiency programs and building and appliance standards.

4: You’ll add new tools to your belt1

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Source: Cost Benefit Analysis by Bronwyn Barry, CPHC, for Quantum Builders, 2009

Larkspur Remodel Window Cost Benefit Analysis

Brand Existing US- Av. Euro Av. PH Certified US -good US-best Canadian

R-value W#5 0.99 2.69 5.73 8.68 6.09 8.64 5.9

Heat Dem # (kBTU/ft2yr) 13.7 7.63 6.97 5.71 6.05 8.01 6.75

Price / $29,400.00 $45,344.50 $50,830.00 $35,507.42 $92,297.79 $39,852.10

Heat Dem delta 0 6.07 6.73 7.99 7.65 5.69 6.95

$ Saving/a** 0 1,736.02 1,924.78 2,285.14 2,187.90 1,627.34 1,987.70

30yr $saving 0 182.10 57,743.40 68,554.20 65,637.00 48,820.20 59,631.00

40yr $saving 0 69,440.80 76,991.20 91,405.60 87,516.00 65,093.60 79,508.00

yrs to paybk 0 16.94 23.56 22.24 16.23 56.72 20.05

30 yr CO2 savings (lbs) *** 0 20.03 22.21 26.37 25.25 18.78 22.94

(Highest/Best rating shown in orange field.)          

* The above revised Sorpetaler cost & rating # reflects the following changes:

New TF Design window profile (rated at R8 value.) with triple glazing

Double glazed wood Accordian-Sliding door at Dining Room

Bug screen for 10 side window units only (no doors.)

** Assuming $0.13 per kBTU/ft2yr (1 Therm = 100,000 BTUs = $1.30 @ 2,200sf =$286.00)

*** 11 lbs of CO2 saved for each Therm saved

3: Passive is going Massive!1

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Source: http://inhabitat.com/the-ridge-net-zero-energy-mixed-use-passive-house-project-gets-thumbs-up-in-philadelphia/

The Ridge, Mixed-Use project approved for Philadelphia, PAOnion Flats, Art + Architecture + Buildingwww.onionflats.com

Image credits: onion flats

3: Passive is going Massive!1

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Source: http://inhabitat.com/the-ridge-net-zero-energy-mixed-use-passive-house-project-gets-thumbs-up-in-philadelphia/

The Ridge, Mixed-Use project approved for Philadelphia, PAOnion Flats, Art + Architecture + Buildingwww.onionflats.com

Image credits: onion flats

2: Everybody is doing it!1

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Zero Cottage, SFDavid Baker + Partners Architectswww.dbarchitect.com

Image credits: David Baker + Partners

2: Everybody is doing it!1

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Images source: http://blogs.sfzc.org/blog/2011/10/18/new-student-housing-at-green-gulch-farm/

Green Gulch Zen Center, Student HousingMarin, CA

JSW+D Architectswww.jswdarch.com

2: Everybody is doing it!1

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Source: http://inhabitat.com/the-ridge-net-zero-energy-mixed-use-passive-house-project-gets-thumbs-up-in-philadelphia/

Field Chiarello Retrofit,Portola Valley, CAScott Schell, EHDDwww.ehdd.com

Image credits: www.greatbuildings.com

Project Green Home,Palo Alto, CAArkin Tilt Architectswww.arkintilt.com

Image credits: Bronwyn Barry

2: Everybody is doing it!1

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Clarum Homes,Menlo Park, CAJohn Suppes, Clarum Homeswww.menloparkpassivehome.com

Image credits: www.menloparkpassivehome.com

One Sky Homes,San Jose, CAAllen Gilliland, One Sky Homeswww.oneskyhomes.com

Image credits: Allen Gilliland

Abatement cost <$50/ton

U.S. mid-range abatement curve – 2030

Source: McKinsey analysis

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CostReal 2005 dollars per ton CO2e

1.0 1.2 1.4 1.8 2.00.2 2.2 2.4 2.6 2.8 3.01.60.4 0.6 0.8

-230

Residential electronics

Commercial electronics

Residential buildings – Lighting

Commercial buildings – LED lighting

Fuel economy packages – Cars

Commercial buildings – CFL lighting

Cellulosicbiofuels

Industry – Combined heat and power

Existing power plant conversion efficiency improvements

Conservation tillage

Fuel economy packages – Light trucks

Commercial buildings – Combined heat and power

Coal mining – Methane mgmt

Commercial buildings – Control systems

Distributed solar PV

Residential buildings – Shell retrofits

Nuclear new-build

Natural gas and petroleum systems management

Active forest management

Afforestation of pastureland

Reforestation

Winter cover crops

Onshore wind – Medium penetration

Coal power plants – CCS new builds with EOR

Biomass power – Cofiring

Onshore wind –High penetration

Industry – CCS new builds on carbon-intensive processes

Coal power plants – CCS new builds

Coal power plants – CCS rebuilds

Coal-to-gas shift – dispatch of existing plants

Car hybridi-zation

Commercial buildings – HVAC equipment efficiency

Solar CSP

Residential buildings – HVAC equipment efficiency

Industrial process improve-ments

Residential water heaters

Manufacturing – HFCs mgmt

Residential buildings – New shell improvements

Coal power plants– CCS rebuilds with EOR

PotentialGigatons/year

Commercial buildings – New shell improvements

Afforestation of cropland

Onshore wind –Low penetration

1.5: Insulation is cheaper than PV

1: Free Beer at the meetings!1

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Passive House California, Silicon Valley Meeting, 2011 Monthly meetings: Sunday 3-5.30pm in Berkeley, CAwww.passivehousecal.org

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THANK YOU!

Bronwyn Barry, Assoc. AIA, CPHCDirector, One Sky HomesPHCA President2012

PHCA Highlights for 2012:• February Meeting at Das Haus, Fort Mason, SF• Design + Build project with Laney College• Shared events with PHNW and NYPH• Trainings• And a few beers…

www.aphnetwork.org