1. GEO SOLAR HOME Fossil fuels replaced by energy from Earth and Sun BIRA September 11 2006

2. NW corridor of Denver metro area

3. Infill site in Arvada, Colorado

4. Mixed Use New Urbanism planned community

5. Southern Orientation

6. Energy Model Model: 1,500sf Semi-detached Townhouse Energy Model Floor Plans Energy Model Elevations

7. Airtight, Super-insulated Shell • Blown in insulation • Airtight windows

8. Raised heel trusses Quick Specs: basement R 25, ceiling R 50, walls R 25, ACH0.15

9. Passive Solar Design Solar Access Innovative Urban Design GENERATION

10. Thermal Mass Model: 1,500sf Semi-detached Townhouse TILE FLOORS THERMAL MASS BRICK WALL

11. Mobile Insulation Double Honey Comb Motorized

12. Earth Tube Aspired Energy Recovery Ventilation System Westflex 250 WAC CF

13. 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.

14. 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

15. Passivehaus

16. Energy Efficiency Targets

17. 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.