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How would you heat water using no electric equipment or fire source? Answered

For example if a hurricane knocks the power out and you need warm or hot water?

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MagicLantern

10 years ago

Solar. Camping stores sell black bags to hold water to be heated by the sun for showering while camping. You can build a solar heater for your house by constructing a large shallow rectangular box with a glass top. In this box install copper pipe in a serpentine pattern. Paint the inside of the box and the pipe flat black. Connect the inlet of this to your fresh water and the outlet to your existing hot-water heater inlet. Position on your roof facing the sun. This will pre-heat your water and can save you energy costs when you do have gas/electricity.

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trf

10 years ago

Chemical reaction as in for example those hot hand packs that you can buy. Once exposed to air it makes heat.