How To Build a Solar Furnace For Under $50

How To Build a Solar Furnace For Under $50
See more at: http://www.goodshomedesign.com/how-to-build-a-solar-furnace-for-under-50/

Some comments:

steve B February 27, 2017 at 8:01 pm Many are using aluminum soffits to capture the heat. Painted black. I hear black nylon screen (screen door screen) is doing even better, 3 layers stretched 1/2″ apart. Curious to try those.

Robert Snider October 10, 2016 at 10:48 am It’s called a thermal siphon. Look it up.

tim January 6, 2017 at 3:22 am i think you’re pretty clueless. you use insulated dryer vent the only place you don’t want insulation and uninsulated pipe and glass elsewhere. the return air is about a hundredth the capacity as the hot air pipe. a much better design is to remove the dryer vent and replace it with several (zig-zagged) layers of black window screen and use dryer vent for the runs to the house.

John March 22, 2017 at 2:18 pm An interesting Idea. Unfortunately it will only work in very mild climates. In the demo most of the heat would be lost from the pipe going to the window. The heat accumulator pipe in the box should be black to absorb heat not silver reflective. Also the air flow would be very restricted by the tiny air intake lines.

Valerie December 19, 2017 at 6:30 pm A materials list is not required. Just watch the video. I would make my intake longer so it reaches the floor, to grab the coolest air.

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