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Water heating: Difference between revisions
→Energy use
(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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{{calc | {{calc | ||
|water_specificheat * waterdensity * 40 kelvin | |water_specificheat * waterdensity * 40 kelvin | ||
| | |kilowatt hours / liter | ||
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|Electricity | |Electricity | ||