Beyond Buckthorns - An automated solar air heater for our indoor food forest Some time ago, I wrote about our solar air heater, which we attached to our house—and which has actually been working very well, aside from the air intake getting blocked. Solar air heaters are mostly...

Added a solar air heater to our biogas shed. This time it also comes with a fan an temperature control. Read www.beyondbuckthorns.com/content/ener... or watch the video at www.youtube.com/watch?v=q3Gd... #permaculture #solarairheater #passivesolar #greenhouse #diy