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Water heating

Revision as of 21:07, 17 May 2023 by Elie (talk | contribs) (Created page with "This page is about hot water systems in homes & buildings. ==Types== * solar thermal panels * electric water heating * natural gas water heating ==Energy use== 49'C is considered the ideal hot water temperature. Anything hotter is a safety hazard (scalding). {{minor|If water is coming in to the building at a typical 9'C, then that's a 40 degree (kelvin) difference.}} Physics shows how much energy it takes to heat the water: {{minor|Same calculation shown in mu...")
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This page is about hot water systems in homes & buildings.

Types

Energy use

49'C is considered the ideal hot water temperature. Anything hotter is a safety hazard (scalding). If water is coming in to the building at a typical 9'C, then that's a 40 degree (kelvin) difference.

Physics shows how much energy it takes to heat the water: Same calculation shown in multiple different units:


Electricity water_specificheat * waterdensity * 40 kelvin kWh / liter (calculation loading)


British Thermal Units water_specificheat * waterdensity * 40 kelvin btu / liter (calculation loading)


Fuel burned to heat each gallon of water (American units) water_specificheat * waterdensity * 40 kelvin teaspoons gasoline / gallon (calculation loading)


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