www.TheDoItYourselfWorld.com

Thanks for the info! You've given me a lot to think about. And, I'll probably be back here with more questions before winter actually sets-in!
Maximum warmth with minimum expense is exactly what I'm looking for!!

Thanks for the info! You've given me a lot to think about. And, I'll probably be back here with more questions before winter actually sets-in!
Maximum warmth with minimum expense is exactly what I'm looking for!!

I'm trying (so far without success) to find any info on building a passive solar heater (for air, not water) using 55 gallon drums... When I was in college some years back someone saw something similar, changed the design somewhat, & built a mini version, maybe 2' x 2', which generated a surprising ...