This installation was completed in February 2013
Our most recent installation juit south of Bozeman, February 2013
Watch a time lapse video of
Above Panel Dimensions (24' x 12')
Size is always customized to the available wall space and heating needs
Heat Output: To
be measured with temperature sensors, air velocity meter, and data logger.
Stay tuned for empirical economics. See Solar Air page for past data
on existing collectors.
Size: 288/ sq ft
Building Size: 4800 sq ft
Target Temperature: 50F
Building Aspect: Straight east-west making for a prime south facing
solar heater with no shading
Building insulation: 1"
of foam installed when building was new in 2011
Cutting away soffit material for hot air return route
Cutting out cold air supply duct with power schear
Ground construction of two 12' panels, all lumber pre-painted so only minor
touchup was needed.
Foam in cold air duct not yet removed.
Building the panels with two layers of fiberglass window screen.
Vertical members consist of
a 2x6, a 2x2, then a 2x4. Below, 6" log screws installed into
pre-drilled holes securely fastens
the three lengths of lumber together.
Panels nearly complete with layers of fiberglass screen sandwiched in
The 2x6 on the right becomes the attachment board to hold the top of the
panel to the
building. The three vertical framing members can be seen in the
End of day #1
Panels mounted to building and repainted. The weight of the panels
rests on a 2x6 ledger
securely fastened to building, seen below the panels. Note additional
that have now been installed in each bay; these will provide backing and
for twin wall. Also note horizontal 2x2 at mid height of panels to
insure vertical members
are plumb and don't twist.
Looking down into the panels from inside the building. Foam removed
from cold air
supply slot being used to seal off soffit chamber to minimize heat loss as
hot air rises up
into soffit chamber. Edges were spray foamed in to secure. The
double set of framing
lumber in center of photo is where the two panels meet in the middle.
Metal screen was re-attached to soffit vent and caulked around the
perimeter. 3 mil
plastic flap, the only moving part in the entire heater, was installed
above the vent to
prevent backdrafting at night; plastic falls against caulking and creates an
air seal to
prevent warm interior air from being pulled down into heater whenever heater
than inside of arena.
Inside air supply registers to be mounted in cutouts. Metal filter
grills to be mounted
Twin wall greenhouse panels being attached to heater panels.
includes caulking the seams between the sheets of twin wall, the perimeter
of the twin wall, and gap between building and panel lumber all the way
around. The entire job consumed 4 tubes of silicon caulk and 4 cans of
spray foam. The entire volume of waste was one 5-gal bucket of black
lumber cutoffs, one kitchen garbage can worth of foam that was removed from
building but not need for soffit insulation, and the plastic protective
sheets from the twin wall. All cardboard laid down on the ground was
gathered from a construction dumpster and recycled upon job completion.
Total on-site time with 2-3 person
crew: 15 hrs (one weekend)
Email with questions, comments, price estimate, or
to schedule a free site visit.