Comment on Heat-pump water heaters are a winner for the climate — and your wallet
Rodeo@lemmy.ca 10 months agoHeating a volume of water a given number of degrees takes the same amount of energy regardless. Using a lower wattage heater is just going to make it take longer, not save any power.
Mr_Blott@lemmy.world 10 months ago
So if you heat the water in a tank, pump it through a cold pipe to a dishwasher, then reheat it, you’re suggesting you’re using the same amount of energy as heating cold water directly in the dishwasher?
No idea how Americans can’t understand that most of the developed world is decades ahead of them environmentally nowadays 😂
Rodeo@lemmy.ca 10 months ago
I understand the difference, I was pointing out the wattage thing doesn’t really make sense.
Rivalarrival@lemmy.today 10 months ago
Using gas to heat water is considerably cheaper than using resistive electric. Especially when the electric was historically provided by coal or gas anyway.
Burning gas to heat water into steam to turn a turbine to turn a generator to pump electricity to a resistive element inside a dishwasher is not nearly as efficient as just burning the gas inside a water heater and sending it to the dishwasher. The heat losses incurred while passing the water from a gas heater to the dishwasher are a tiny fraction of the losses incurred in the convoluted processes involved in traditional electrical generation.