This is just a little demo, not big enough for anything serious. Just wondered what you all thought about it. Its a layer of plastic along the outer edge of only 2 sides, then tin foil, then stacked accordingly to the image and crazy glued together. I think with tinfoil being so thin, that it should do well with transferring heat. Granted, if its 30 degrees outside and 70 inside, the air coming in will only get up to 50, which really isnt all that bad.
A real model that i would test would probably be about 10" unlike this 4" model.
![](https://ohioreef.com/proxy.php?request=http%3A%2F%2Fwww.aquatic-refuge.com%2FRandomPics%2Fheat1.jpg&hash=909a250fc9a3fd803e00d6a93c28454006eac5f7)
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