I'm going to be putting between 5 and 10 55 gallon drums under my house for hot/cold water storage from various sources. I'm going to build a plywood box around the drums, and fill it with insulation. What would be the best CHEAP insulation I could use?
Some things I was thinking:
-Straw
-Dirt
-Sand
-Packing peanuts
-Newspaper
-Concrete?
Any other ideas? What would give me the most bang for my buck, and keep a bucket of water hottest the longest?
And this has what to do with making your electricity from scratch?
