An Affordable Energy Efficient Home Utilizing Solar and Wind Power and Solar Hot Water John Gardner, PE
New House Completed May 2004
Energy Efficient Residential Construction Utilizing: Energy Star Construction Green Building Materials Rainwater Collection Solar Hot Water Hybrid/Solar Wind System
Energy Star Construction House oriented North/South South & West walls shaded Skin Vent wall construction Continuous soffit & ridge vents 14 SEER A/C Rigid A/C ducts w/R-8 insulation Fresh air intake R-30 attic, R-19 wall insulation Radiant barrier roof deck White metal roof Double pane, Low “E”, vinyl frame windows Energy Star Appliances
Site Orientation North South West East
White Metal Roof Radiant Barrier House Wrap
Skin Vent Wall Construction Bottom Vent Top Vent 3/4” air gap Siding
Sealed Wall Penetrations
Double Pane Windows Low- “E” Vinyl Frame Minimum SHGC for Energy Star = 0.4
14 SEER Air Conditioner
Green Building Materials Low VOC Paint Engineered Beams Fiber-cement Siding Formaldehyde-free insulation Cork Flooring Minimal construction waste
Minimum Construction Waste We used ½ of one of these containers
Solatube Skylight
Home Performance
Summary Ventilated attic Attic temperatures are reduced Temperature and humidity levels in the attic are dynamic Energy costs are reduced Results achieved with standard materials and common building practice
Energy Savings 60% less electricity compared to a typical house in our area because of energy efficient construction and Solar/Wind power. 40% less gas compared to previous year after adding Solar Hot Water Heater & supplemental heat Reduced Carbon Footprint
Supplemental Heat Vermont Castings Dutch West Wood burning stove With Catalytic Converter Heat Powered Fan
Attic vs.Outside Temperature New House - White Metal Roof Radiant Barrier Ridge Vent Continuous Soffit Vents Our New House Outside Attic New Construction Old House - Dark Composition Shingles Soffit Vents Inadequate Ridge Vent
Recommendations Site orientation is very important –Shading –Prevailing winds Utilize Energy Star ® recommendations –Reduced energy/water requirements –Reduces heat load in the house Keep the heat out of the house –Reflective roof –Porches –Light exterior paint color
Recommendations Adjust the air conditioner properly –Run long enough to remove humidity –Utilize good sealed air ducts Reduce indoor heat load –Compact fluorescent lamps –Efficient appliances Maintain good air quality –Non toxic building materials –Fresh air intake Educate your builder!!!
Icing on the Cake Hybrid Solar/wind system –Generate 190 KWH/month Solar hot water heater –Preheat well water to deg. F Rainwater collection system –Collect 1400 gallons in a 1” rainfall
$6.75/Watt installed Battery backup System
1 KW Bergey XL-1 Wind Turbine
1000 Watt PV Array
Solar/Wind Control Center
Solar Hot Water Collector
Solar Hot Water Circulator
Secondary Tank With Heat Exchanger
Sealed Downspouts Storage Tank Rainwater Collection System
How much did all this cost? Base line house cost Hybrid Solar & Wind Rainwater collection Solar Hot Water
Added Cost/ft 2 to the House 2100 Square feet Solar/Wind - $6.43 Solar Hot Water - $0.88 Rainwater Harvesting - $0.87 Total - $8.18/ft 2 Cost to build the house - $64.00/ft 2 $8.18/ft 2 $72.18/ft 2 Ave. sales price in our area: $86.90/ft 2
How much did it cost? This? Or This!
Solar Energy At Work Everyone can do it!
The Future
Home, Sweet Home Thank You!