Question: solar air heater do it yourself?
Answer: Step 1: Size the Box. The first thing to do is figure out where you want to place the box or boxes you build. ... 
Step 2: Lay Out the Box. The box layout is simple. ... 
Step 3: Install the Hose. ... 
Step 4: Make the Window Openings. ... 
Step 5: Staple on the Plastic. ... 
Step 6: Hook Up the Box. ... 
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