Top 10 Reasons to Build Passive House in CA in 2012 by Bronwyn Barry, Director, One Sky Homes

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Top Ten Reasons
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to Build ‘Passive House’
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in California for 2012
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“The Passive House movement shows us what's
possible with ultra-low-energy buildings. These
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homes are pushing the envelope and creating an
invaluable collection of case studies that
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demonstrate just how dramatically energy
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consumption can be reduced--and how we can
meet the targets for carbon emission reductions
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that are needed to slow global warming. It
provides metrics and a path for implementation.”
– Alex Wilson
Bronwyn Barry, Assoc. AIA, CPHC
Director, One Sky Homes
PHCA Co-President
2012

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10: It wins awards and recognition
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The ‘Go Home’ receives USGBC 2011 Project of the Year Award
G.O Logic Homes, Belfast, Maine
www.gologichomes.com

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10: It wins awards and recognition
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R-House, Syracuse, NY wins AIA Housing Award 2011
Della Valle Bernheimer and Architecture Research Office
www.d-bd.com and www.aro.net
Image credits: della valle bernheimer

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9: Our climate makes it easy!
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Carbon Neutral & Net Energy +
Passive House
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in…. WISCONSIN!
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TE Studio
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www.testudio.com
Image credits: tim eian
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Fossil-fuel free home +
Passive House
in…. ALASKA!
Thorsten Chlupp
www.cchrc.org
Image credits: sam harel/newsminer

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8: It’s proven to work!
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LBNL Study monitors
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Ten Deep Energy Retrofits
(Including two PH projects
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Both found to perform
AS PREDICTED!
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Brennan Less & Jeremy Fischer
Lawrence Berkeley National Labs
Source: http://eetd-seminars.lbl.gov/sites/eetd-
seminars.lbl.gov/files/DER_LBNLPresentation_Final_Au
g2011.pdf

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7: It’s not far off Title-24 req’s
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Case Study #1:
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Project: Stettner Residence
City: Albany, CA
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TFArea: 1,448 sf
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SSHD: 4.43 kBTU/sfyr
ACH:0.5 - 0.7 @50Pa (tbc)
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Architect: Greg Armitage, AIA
Builder: Jim Allen, Construction Etc.
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CPHC: Heidi Stettner
Image: Heidi Stettner, 2012.

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7: Case Study #1 – Albany, CA
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80
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70
60
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Typical T-24 Project
50 R-value
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(hr.ft2°F/BTU.in)
40 PH Project R-value
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(hr.ft2°F/BTU.in)
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20
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Windows Walls Roof Floor Total
Stettner Residence T-24 vs PH Insulation Value Comparison
Data source: Bronwyn Barry, CPHC for Quantum Builders, 2010

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7: Case Study #2 – San Jose, CA
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Project: Codianne Miller Residence
City: San Jose, CA
Area: 2,049 sf (TFA) 2,520sf (Reg)
SSHD: 1.84 kBTU/sfyr
ACH:(not built)
Design+Build: One Sky Homes

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7: Case Study #2 – San Jose, CA
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100
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90
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80
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70
60
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50 T-24 (R-nom)
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PH (R-eff)
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30
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20
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0
Fndn Walls Roof Windows TOTAL:
Codianne Miller Residence, San Jose, CA
One Sky Homes
Data source: Bronwyn Barry, CPHC, One Sky Homes, 2012

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6: You will acquire new skills
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THERM ANALYSIS:
Slab Foundation Study
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For San Jose NZE project:
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1: Best case:
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Ye (for PHPP) 0.042 Btu/hr*f*F
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2: Worst case: (not shown)
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Ye (for PHPP) 0.136 Btu/hr*f*F
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3. Most effective case:
Ye (for PHPP) 0.103 Btu/hr*f*F
Source: THERM analysis by Bronwyn Barry, CPHC, for One Sky Homes, 2012.

11. 1
5: AB 32 (2020) and AIA 2030
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AB 32 requires California to lower greenhouse
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gas emissions to 1990 levels by 2020, the
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equivalent of taking approximately 28 million
cars off the nation's roads. To meet reduction
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targets, the California Air Resources Board
(CARB), the lead agency responsible for
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implementing the act, is following a blueprint
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approved in late 2008 known as the AB 32
Climate Change Scoping Plan. The plan lays out
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the strategy and a comprehensive set of
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actions including:
Expanding and strengthening energy
efficiency programs and building and
appliance standards.
Source: http://www.edf.org/climate/AB32?s_src=ggad&s_subsrc=ab32&gclid=CJrphbG42q0CFQiBhwod03wjCg.

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4: You’ll add new tools to your belt
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Larkspur Remodel Window Cost Benefit Analysis
Brand Existing US- Av. Euro Av. PH Certified US -good US-best Canadian
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R-value W#5 0.99 2.69 5.73 8.68 6.09 8.64 5.9
Heat Dem #
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(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
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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
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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
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30 yr CO2
savings (lbs) *** 0 20.03 22.21 26.37 25.25 18.78 22.94
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(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
Source: Cost Benefit Analysis by Bronwyn Barry, CPHC, for Quantum Builders, 2009

13. 1
3: Passive is going Massive!
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The Ridge, Mixed-Use project approved for Philadelphia, PA
Onion Flats, Art + Architecture + Building
www.onionflats.com
Image credits: onion flats
Source: http://inhabitat.com/the-ridge-net-zero-energy-mixed-use-passive-house-project-gets-thumbs-up-in-philadelphia/

14. 1
3: Passive is going Massive!
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The Ridge, Mixed-Use project approved for Philadelphia, PA
Onion Flats, Art + Architecture + Building
www.onionflats.com
Image credits: onion flats
Source: http://inhabitat.com/the-ridge-net-zero-energy-mixed-use-passive-house-project-gets-thumbs-up-in-philadelphia/

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2: Everybody is doing it!
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Zero Cottage, SF
David Baker + Partners Architects
www.dbarchitect.com
Image credits: David Baker + Partners

16. 1
2: Everybody is doing it!
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Green Gulch Zen Center,
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Student Housing
Marin, CA
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JSW+D Architects
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www.jswdarch.com
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Images source: http://blogs.sfzc.org/blog/2011/10/18/new-student-housing-at-green-gulch-farm/

17. 1
2: Everybody is doing it!
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Field Chiarello Retrofit,
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Portola Valley, CA
Scott Schell, EHDD
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www.ehdd.com
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Image credits: www.greatbuildings.com
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Project Green Home,
Palo Alto, CA
Arkin Tilt Architects
www.arkintilt.com
Image credits: Bronwyn Barry
Source: http://inhabitat.com/the-ridge-net-zero-energy-mixed-use-passive-house-project-gets-thumbs-up-in-philadelphia/

18. 1
2: Everybody is doing it!
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Clarum Homes,
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Menlo Park, CA
John Suppes, Clarum Homes
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www.menloparkpassivehome.com
Image credits: www.menloparkpassivehome.com
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One Sky Homes,
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San Jose, CA
Allen Gilliland, One Sky Homes
www.oneskyhomes.com
Image credits: Allen Gilliland

19. 1.5: Insulation is cheaper than PV Abatement cost
<$50/ton
Cost U.S. mid-range abatement curve – 2030 Commercial
Afforestation of buildings –
Residential
Real 2005 dollars per ton CO2e buildings –
cropland HVAC HVAC
equipment equipment
90 Coal power plants– CCS
efficiency efficiency
rebuilds with EOR
Industrial
Residential
Fuel economy packages process Coal mining – Active forest Solar CSP
buildings – Distributed
– Light trucks improve- Methane mgmt management
Shell solar PV
60 ments
retrofits
Residential
electronics Commercial buildings Commercial Nuclear
– Combined Residential
buildings – new-
heat and water heaters
Control systemsbuild
30 Residential power
buildings –
Lighting
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0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
Potential
Onshore wind – Gigatons/year
-30 Onshore wind – Industry –
Low penetration
High penetration CCS new
Industry –
builds on
Combined
carbon-
heat and Biomass power – intensive
-60 power Cofiring processes
Cellulosic
biofuels Manufacturing –
Existing power HFCs mgmt Car hybridi-
Coal power plants – CCS new zation
plant conversion
-90 Residential builds with EOR
efficiency
buildings – New improvements Onshore wind – Medium
shell Coal-to-gas
Commercial penetration
improvements shift – dispatch of
electronics Conservation
-120 Winter existing plants
tillage
Commercial cover crops
buildings – CFL Coal power plants –
lighting Reforestation CCS rebuilds
-230
-220 Commercial
buildings – Commercial
LED lighting buildings – New Afforestation of
Natural gas and Coal power
shell pastureland
petroleum plants – CCS
Fuel economy packagesimprovements
–
systems new builds
Cars
management
Source: McKinsey analysis

20. 1
1: Free Beer at the meetings!
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Passive House California, Silicon Valley Meeting, 2011
Monthly meetings: Sunday 3-5.30pm in Berkeley, CA
www.passivehousecal.org

21. 1
PHCA Highlights for 2012:
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• February Meeting at Das Haus, Fort Mason, SF
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• Design + Build project with Laney College
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Shared events with PHNW and NYPH
• Trainings
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• And a few beers…
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THANK YOU!
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Bronwyn Barry, Assoc. AIA, CPHC
Director, One Sky Homes
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PHCA President
2012
www.aphnetwork.org