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alt energy sources: cans and can'ts
Compost mound for heating water-----Jean Paine---pack it tight or leave it loose?
Solar steaming - a rose inspires smart way to collect and purify water
Small greenhouse as a solar heater?
Solar water heater for baseboards
Solar hot water problems - would love some advice!
How do you collect water in winter when everything is frozen?
Rocket Stove in a school bus conversion?
Hydrogen gas production
In floor heat. Thermosyphon
Solar in South/Central America
New tankless hot water heater design hitting market.
does anyone know where to find an affordable absorption chiller?