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Thousand Home Challenge
Intro to Indicators of Performance
George Beeler, AIM A S S O C I A T E S
Petaluma, CA [email protected]
For more information: Linda Wigington, ACI
724-852-3085 [email protected]
www.affordablecomfort.org9/12/2010
Purpose of this Power Point:
1. Introduce the Thousand Home Challenge (THC)
2. Review the criteria for meeting the Thousand Home Challenge
3. Show case study: Beeler live/work, rehabilitation of 1940 energy hog, Petaluma, CA
The Thousand Home Challenge
is designed to:
•Reduce the energy consumption of existing
homes by 70-90% (total use, not just space
conditioning)
•Develop indicators of home energy performance
•Exemplify the performance-based systems
design approach
•Assemble local / regional centers of excellence
•Stimulate collaboration, creative problem-solving,
and innovative products and approaches
How is the Thousand Home
Challenge Unique?
Bottom line – actual total use, not modeled
Key metric - Customized household energy use threshold allowance
Behavior, lifestyle, community solutions on map
Stimulate creative solutions; Lots of potential paths
Thousand Home multiplier – vision for scalability
Optimize Investment
Conservation
Efficiency
Renewables
Community
Solutions
Customized based on goals, opportunity, resources, & needs
Multiple paths to get to deep reductions!
Not Included in THC
but Very Important
Embodied Energy – food, energy, consumables, waste, building materials
Transportation Energy
Key Metric
Transparent & Direct
Include Occupants
Net Annual Household Site Energy
(wood included, solar is not)
Two Options for QualifyingMeet or exceed a
household energy allowance
OPTION A
Relative, 75% reduction
Annual measured use –pre and post
Best for higher use households
OPTION B
Absolute, not relative: customized by household
Inputs – climate, house size, #of occupants, heat source
Best – Low Use households or those without pre-use
Option B
Proportional to the Opportunity
Responsive but not linear
House Size – thermal loads are not strictly linear
Occupancy – More people use more energy, but not linear
Climate – In mild climates heating & cooling loads should be eliminated
OPTION B: Customized
Household Threshold
Estimates energy needed for a very high performance house for
Heating
Cooling
Hot Water
Everything Else
Sum is the actual site energy household thresholdthat must be met or exceeded in order to meetthe Thousand Home Challenge
How is Solar Counted?
Passive solar & active solar thermal systems offset energy use
Solar PV, wind, and hydro may need to calculated as a credit, depending on how output is metered
Feedback Welcome!
The first portion of presentation developed by
Linda WigingtonDirector of Special ProjectsAffordable Comfort, Inc.
724-852-3085lwigington@affordablecomfort.orgwww.affordablecomfort.org
Thousand Home Challenge
Ellen & George Beeler
Live/Work Building
Rehabilitation
1940 Vintage - Petaluma, CA
CASE STUDYUpdated 9-9-10
13
AIM A S S O C I A T E S
EXISTING
At Left is Typical Neighborhood Bungalow
At Right is 1940’S Building Before 2005 Renovation
Southwest view
14AIM A S S O C I A T E S
BEELER FAMILY PORTRAIT by Emily Vincent 5/2010
George holding Rudy and Ellen holding Iggy
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DOWN TOWN
BEELER
RESIDENCE
Location is critical to a
green lifestyle
Rehabilitate
existing building
Or use infill site
To reduce driving, be
close to:
Work
Schools
Friends
Groceries, etc.
Able to walk & bike
Utilize existing
infrastructure
Avoid destruction of
habitats
Avoid destruction of
farm land
LOCATION • ELLEN & GEORGE BEELER LIVE/WORK REMODEL
FUTURE
LIGHT RAIL
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AIM A S S O C I A T E S
AIM FOR ZERO NET ENERGY & AVOIDING OF FOSSIL FUELS IN PHASES
17AIM A S S O C I A T E S
2010 rehabilitation phase energy efficiency strategies: • Increased attic insulation from R-30 to R-50 & air infiltration improvements• Den made into cocoon space• Solar air heating & solar space heating added to cocoon• Solar water heating
2005 rehabilitation phase energy efficiency strategies: • Passive ventilation & night cooling with turbine ventilator• Solar air heating of ground floor• Photovoltaic system
18AIM A S S O C I A T E S
FIRST PHASE: 1998 PURCHASED BUILDING, MAJOR REHABILITATION
Energy Efficiency Features to Reduce Energy Use approx. 75%
Add insulation
R-30 blown-in cellulose attic insulation
Dense-pack cellulose wall insulation: R-13 @ 2x4 studs, R-20 @ 2x6 studs
Replaced single glazed aluminum windows with fiberglass Low-E2 argon
Replaced existing 40% efficient furnace with 96% efficient furnace with two-level
burner and high-efficiency variable speed fan with duct air pressure auto
adjustment so that we may use dampers
Manual, central duct dampers for zone control of heating each room
Removed conventional water heater & added demand type water heater
Energy Star appliances (top 10% of Energy Star)
Almost all lights are fluorescent or CFL
Solar clothes dryer = clothes drying lines
Carefully open & close shades/windows for solar gain or passive cooling
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AIM A S S O C I A T E S
SECOND PHASE - 2005 REMODEL
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ALTERNATIVE ENERGY SYSTEMS
Turbine ventilator uses wind to draw air out of living areas for passive ventilation and night cooling
• 24” throat diameter.• It draws 2,000 cfm during 5 mph
breeze • A neoprene gasketed duct damper
prevents air leakage common with whole house fans
Solar air heating is provided by 200 sq. ft. of Solar Wall brand transpiring panels
2,500 watt photovoltaic array provides all live/work building electricity plus electric bicycle & future electric car
23AIM A S S O C I A T E S
DUCTS UNDER TURBINE VENTILATOR
14” DIAMETER DUCT TO DRW WARM AIR FROM
UNDER PHOTOVOLTAIC PANELS
24” DIAMETER DUCT TO GASKETED DAMPER AT
CEILING OF STAIR WELL FOR WHOLE HOUSE
VENTILATION
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SOUTHEAST ELEVATION
AFTER 2005 RENEWABLE ENERGY REMODEL 25
AIM A S S O C I A T E S
All existing windows were replaced with high-performance windows, except this living room window because it was too expensive (unusual shape). That is why the R-4 shade is needed
Three-layer honeycomb (R-4) interior shadeIt is difficult to keep cold air from flowing out from around the edges
Cable trellis was modified, so vines shade office glass door but do not shade living room window
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DIRECT GAIN SOLAR HEATING WHEN THE SHADE IS RAISED.
THIS ALSO PROVIDES A DELIGHTFUL PLACE TO KNIT!
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2010 blower door test was done after 3rd phase remodel Air sealing when walls opened & more attic insulation was installed
Brennan Less & Jeremy Fisher operate a blower door to test the combined air leakage of the ground & main floors
They are graduate architecture students at UC Berkeley and interns at LBNL
Prior to 2010: 0.45 ACH 50 Pasc
There will be monitoring of all energy use & viewable onlineThe results have not been reported as of 9/12/2010
AFTER BLOWER DOOR TEST
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Presentation by George Beeler, Principal
Architect
A I M A S S O C I A T E S
A R C H I T E C T U R E & I N T E G R A T E D D E S I G N T E A M M A N A G E M E N T
100 Fair Street AIM © September 2010
Petaluma, CA 94952-2515 www.aimgreen.com 707-763-3300 x2
30AIM A S S O C I A T E S