Home Improvement

11655 readers

2 users here now

Home Improvement

founded 2 years ago

MODERATORS

nieceandtows@lemmy.world

nieceandtows@programming.dev

227

Replaced my electric resistance water heater with heat pump, dramatic reduction in energy usage (infosec.pub)

submitted 6 days ago by pageflight@lemmy.world to c/homeimprovement@lemmy.world

33 comments fedilink hide all child comments

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.

you are viewing a single comment's thread
view the rest of the comments

[–] dirtbiker509@lemmy.world 1 points 5 days ago* (last edited 5 days ago) (2 children)

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.

[–] pageflight@lemmy.world 1 points 1 day ago

Unheated but insulated unfinished basement. And this unit does have duct connections that I haven't made use of (yet).

[–] GreenCrunch@lemmy.today 1 points 5 days ago (1 children)

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.

[–] KlavKalashj@lemmy.world 1 points 4 days ago (1 children)

You can also connect it through the wall so that it uses outside air for its energy. Modern heat pump technology is so good it can remain effective all the way down to -25C.

[–] speculate7383@lemmy.today 1 points 15 minutes ago

While that is true of heat pump technology in total, I have not seen any heat pump water heaters in the US that work below freezing. One example: my Rheem manual says it will work down to about 42F / 5C. Below that, it uses resistive heating elements.

But I'm sure it's coming eventually to water heaters.