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GEO SOLAR HOME. Fossil fuels replaced by energy from Earth and Sun BIRA September 11 2006. NW corridor of Denver metro area . Infill site in Arvada, Colorado. Mixed Use New Urbanism planned community. Southern Orientation. Energy Model. Model: 1,500sf Semi-detached Townhouse.
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GEO SOLAR HOME Fossil fuels replaced by energy from Earth and Sun BIRA September 11 2006
Energy Model Model: 1,500sf Semi-detached Townhouse Energy Model Floor Plans Energy Model Elevations
Airtight, Super-insulated Shell • Blown in insulation • Airtight windows
Raised heel trusses Quick Specs: basement R 25, ceiling R 50, walls R 25, ACH0.15
Passive Solar Design Solar Access Innovative Urban Design GENERATION
Thermal Mass Model: 1,500sf Semi-detached Townhouse TILE FLOORS THERMAL MASS BRICK WALL
Mobile Insulation Double Honey Comb Motorized
Earth Tube Aspired Energy Recovery Ventilation System Westflex 250 WAC CF
Geothermal Exchange • Geothermal pre-heat & pre-cooling for incoming fresh air consists of 260 feet of 6” PVC pipe buried between 6 & 8 feet below ground • With this system, the ERV is able to: • run continuously even if exterior temperatures are below 28º F • achieve maximum heat recovery of 95% This winter, when exterior temperatures were 4º F, incoming fresh air to the ERV was measured at 38º F. And in summer, 95º turns into 60º, @ 200 cfm.
Community Ground Source Heat Pump for Domestic Hot Water 240,000 Btus • Horizontal Loop Field • Heat Pumps 4 x 10 tons • Tanks, Pumps, Controls • Insulated Pipe to Homes
Actual Performance, November 2005 – July 2006 • Warm and toasty all winter, cool this summer • December dinner party: One guest heard it was a “solar house” & came prepared – long underwear and flannel shirt...but with nighttime outdoor temp at 15° after a sunny day, and with radiant underfloor heat off, at the dining room table it was 73°…offered ice packs and wet towels to help him out • February cold snap: After last sun midday Tuesday, house held heat until midday Thursday before underfloor heat engaged. Minus 18°, home stayed 68-70° and comfortable. • 3 a.m. and minus 7°, bedrooms would stabilize at 64° – with radiant heat off – due to occupants generating ~400 BtU/hr.