Solar space heating is tricky. Air is harder to keep warm than water, and while most of us need a shower on a hot day—we tend to want space heating when the sun is not doing enough for us. Nevertheless, from a Mad Max style partially solar heated home, through a DIY solar heater from old campaign signs (yeah, politics and hot air...) to a soda can solar panel, we've seen plenty of attempts at harnessing the rays of the sun to actively heat the air inside our homes. Here the folks at Fair Companies present one Seattle man's attempt...