CHOICE
ENERGY
SOLAR AIR HEATING
Solar furnaces as a heating solution:
* Require no fuel
* Have no moving parts
* And are by far the most Cost Effective heating option available.
The only requirement being a good south facing wall and.....Sun.
Dimensions (12' x 8")
How It Works
Round openings are created through your existing wall at top and bottom,
allowing heat as well as daylight to enter while retaining the vast majority
of the inside wall space in its original condition.
The exterior surface can remain its original color, or painted the sun's
favorite color (black) for additional heat output.
2x6 framing is attached to the outside of the building onto which clear polycarbonate panels are attached.
The end result is a sealed 6-inch thick greenhouse that pumps warm air inside.
It makes heat when you most need it - winter - and turns off in the summer. The panel receives very little direct light during the summer months because of the high angle of the sun, however, during winter the low angle sun comes in at full strength.
Backdrafting during night time or cloudy weather is prevented with simple flaps on the inside of the passages.
Installation takes only a matter of days.
Email
for a price estimate or to schedule a site visit.
Specifications of heater shown at top left of page
Heat
Output:
Considering a 20x8 collector, 160 sq ft *
(Pictured Below)
Building insulation: R19 in walls and ceiling of 700 sq ft room
Temp rise between intake and output vents: 50-60 degrees
Btu of peak output: 25,000 Btu/hour, total daily heat gain
130,000 Btu, or 38 kWh (kilowatt hours)
Petroleum fuel equivalent of 130,000 Btu: 2 gallons
Indoor air temp achieved on sunny day: 60-75 degrees F
Time required to raise indoor air temp from 35 to 65 degrees: 3
hours
Cost per sq ft of collector (materials only, Jan 2009):
$3.50/sq ft
Cost per sq ft of installed collector: $12-15/sq ft
Cost of commercially available collector: $61.59/sq ft plus
shipping and installation (includes solar fan)
* Taken by permission from Gary
Reysa, Build A Simple Solar Heater, Mother Earth News,
December 2006/January 2007
These heaters are designed with the generous and valuable hands on research
of Gary Reysa, author of the following article:
http://builditsolar.com/Projects/SpaceHeating/solar_barn_project.htm
Gary lives here in Bozeman and
is host for an excellent web site of low cost, weekend scale, do-it-yourself
solar projects. 
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