cross-posted from: https://lemmy.world/post/34021020
I recently installed an Emporia Vue with monitoring for the individual circuit my water heater is on. It captured the very significant difference in energy usage from replacing resistive heat with heat pump.
Out of curiosity, is your new water heater inside your house in a heated area? If so is your house heated with electricity (heat pump or resistance) that would also be on this chart? Or do you have furnace burning NG or propane?
Not that heat pumps are bad, they are fantastic. But if your house heat isn’t also on your graph, you’re not seeing the whole picture. The water heat pump is actually using the very warm air in the house to heat the water. But it’s making your house colder and then your house heater needs to run more to make up the difference.
For areas where you want to cool or dehumidify the air these help though. So where I live, during the summer these would effectively be “free” - you were going to use that energy to cool the house anyway with your AC, now you’ve just put that heat in water instead.