16. 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
17. KWH Usage per Month
2500
2000
Typical House in our Area
1500
KWH
Our Old House
1000
Our New House
500
0
Jan. Feb. Mar. April May June July Aug. Sept. Oct. Nov. Dec.
Month
18. 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
19. Supplemental Heat
Heat Powered Fan
Vermont Castings
Dutch West
Wood burning stove
With Catalytic
Converter
20. 110
100
90
Attic Attic vs.Outside
e p r tue e . )
Temperature
T m e a r (D g F
80
Outside
70
60
50
New Construction
Our New House
40
8:00 9:00 10:00 11:00 12:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00
AM AM AM AM AM PM PM PM PM PM PM PM PM
Time of Day
130
New House - White Metal Roof
Radiant Barrier 120
Ridge Vent Attic Temperature
110
Continuous Soffit Vents
Temperature (Deg. F
100
90
80 Outside Temperature
70
60
Old House - Dark Composition Shingles Previous House
Soffit Vents 50
Inadequate Ridge Vent 40
8:00 AM 9:00 AM 10:00 AM 11:00 AM 12 Noon 1:00 PM 3:30 PM 4:30 PM 6:30 PM 8:30 PM 10:30 PM
Time of Day
21. 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
22. 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!!!
23. Icing on the Cake
• Hybrid Solar/wind system
– Generate 190 KWH/month
• Solar hot water heater
– Preheat well water to 90-100 deg. F
• Rainwater collection system
– Collect 1400 gallons in a 1” rainfall
32. How much did all this cost?
• Base line house cost
• Hybrid Solar & Wind
• Rainwater collection
• Solar Hot Water
33. Added Cost/ft2 to the House
2100 Square feet
• Solar/Wind - $6.43
• Solar Hot Water - $0.88
• Rainwater Harvesting - $0.87
• Total - $8.18/ft2
Cost to build the house - $64.00/ft2 Ave. sales price
$8.18/ft2 in our area:
$72.18/ft2 $86.90/ft2
34. How much did it cost?
This? Or
This!
This?
This?
