![DIY Metal Can Solar Heater [VIDEO]](http://32pscm16mza81bp71x2anhjy.wpengine.netdna-cdn.com/wp-content/uploads/2015/05/canheat.jpg)
This simple solar heater made of metal cans, steel or aluminum, can produce a surprisingly strong and consistent airflow upwards of 140F.
On a heavy snow day you’re looking at somewhere around 75-85F.
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cool-didn't explain a few things-leave it inside and turn it on? draw air from outside?
Here're more detailed instructions on what it is that KK would like to tell with his OP:
http://www.builditsolar.com/Experimental/PopCanVsScreen/PopCanVsScr...
there is not enough sunlight in the winter heat the cans so how does it produce heat. Missed what the fan was powered by a battery I guess
It's a simple heat-exchange system. They work in the winter too. Efficiency might be a little lower than it is in the summer though depending on how maticulous you've been when you've built it (paint the cans with black paint). :)