Hot Water Heating Efficiency
Discussions focus on the efficiency of hot water heating systems like heat pumps versus traditional tanks, methods of heating water (resistive or heat pump), and utilizing byproduct or waste heat from appliances, showers, or other sources for domestic hot water or space heating.
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The hot water is a byproduct, you don't use the electricity for it.
Is this any more efficient than a typical hot water tank in US homes?
I wonder how the water being heated? Resistive or heat pump?
I like them to do 1 step further and use the free heated water for warm water needs.
Doesn't that depend on where the electricity for the hot water comes from?
A water heater may be better - warming incoming water to save hot water cylinder bills or heat a pool if there is enough heat. Something that needs short bursts of heat would be harder to implement. I know someone who uses a waste water to raise the incoming water temperature 1-2 degrees C and it saves a measurable amount of money on power bills.
Sorry, that should read "domestic water heaters"
I don't follow. My hot water is heated up about 60cm before the tap, as it runs through. Is that a regional thing? Are you saying that you're keeping a large quantity of water at temperature at all times just in case someone might need it later? Wouldn't that be super inefficient energy-wise?
Why shouldn't you use the heat pump to heat water?
This is what most (all?) of machines do. Heat water when they need hot water