Celebrate “culture” in agriculture & share skills like growing, cooking, canning
A good use for political signs after the election - a solar forced air heater!
This is a prototype easy to build rooftop forced air heater that produces 45 degree increases at a high CFM CFPM rate. This one is made out of cardboard. A real one can be made out of weather proof material.
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Comment by Ben Jones on October 23, 2008 at 11:08am -
Pretty cool stuff!
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