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How Much Will it Cost Me to Have Free Heat?

Solar Heater / Furnace - Soda Cans? Passive?   Aluminum Soda / Pop Can Solar Heater / Furnace Daniel Strohl got a whole bunch of people talking by posting details of his soda can garage heater: He made a second version that's apparently…
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Thermal Massification

This article is an attempt to journal my experiments with adding thermal mass on and around my small woodstove in my 2-story, 2-car garage.  This is my shop.  This is where I play, build, tinker and wrench on things.  It needs to be warm…