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I'm building one of those solar heaters. Gonna save some cash this winter! I'm making a screen design and I've been looking around for fans. I'm not too big into electronics, but I've heard about snap disc switches that people buy and rig up to turn the fan on automatically? I've been researching th...

Passive solar is a great start! I've built lots of active solar colectors , though, and they do make a lot more heat. There are tons of designs and approaches. One company is pushing a product called Okapi. It's for active solar heating, you know, with fans and such...totally different approach, but...

Awesome to see a teenager interested in solar heating! It is definitely an old idea, but it is finally making itself into the commercial market: they actually sell these solar collector heaters in north america... But the technology is a little behind the times for most commercial units. There's a n...