|Project by Firewood20||posted 12-22-2011 07:23 AM||4600 views||8 times favorited||10 comments|
A buddy and myself built this solar kiln about 6-8 months ago have yet to use it… We did a lot of research on these things and had fun building it.(hope we did it right) We first milled a walnut tree last year and air dried it… which took a long time and warped quite a bit(we lost a lot of bdft) That’s what got us to believe we could speed the drying time up and control the RH with a kiln. Instead of paying someone to do it for us we used almost all recycled lumber and plywood and only bought a attic fan, wireless thermometer/RH, and the polycarbonate top(we first used painter’s plastic but that didn’t even last this last summer. For example how hot it got in there… 80F partly cloudy day here on the central coast california(this last summer) it was 130F inside, we still need to find the average for the different times of the year around here so we can set the fan to recirculate the air over the lumber every so often in the day. I will update with inside pictures but it still needs more black paint inside to retain heat. The approx size is 4’x8’x6.5’. and the slope of the roof is exact correlation to the latitude we fall at(it matters). Also the direction the roof faces(south facing) The unpainted board on the side is only to cover a vent that we are making sliding doors for to control air flow in and out, that are located on the sides and rear of the kiln.
-- Dustin, Central Coast California