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No gas No electricity . Heat 2000 liters of water every day #invention

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DIY Solar Air Heater! - The Steel Slat “Drip-Edge” Solar Heater! - New Design! 160F 74C in January!

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DIY heating stove! and super fast and efficient hot water system! Store energy from sand batteries

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DIY Solar Thermal Water Heater! - COPPER PIPE Solar Water Heater! - Easy DIY (full Instr.) 150F+

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