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Is it likely cheaper to use a space heater than full central heating if you literally dont even use much of the space in the house that you never like go anyway? (lemmy.world)

submitted 1 year ago by cheese_greater@lemmy.world to c/asklemmy@lemmy.ml

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[–] LastYearsPumpkin@feddit.ch 4 points 1 year ago (2 children)

Because in the most efficient systems, you aren't creating heat, you're moving heat.

https://youtu.be/7J52mDjZzto

Just as a made up example - with a space heater, you could get 1000 watts of heat from 1000 watts of electricity, or you can move 1500 watts of heat with 1000 watts of electricity with a heat pump.

It's pretty neat.

[–] Junkers_Klunker@lemmy.world 4 points 1 year ago

The heat pump in my home has an SCOP of 4.9 under perfect conditions and ~3.5 under normal conditions, which means 1kW of electricity in equals 3.5-4.9kW of heat out.

[–] Deconceptualist@lemm.ee 1 points 1 year ago

Ohh okay, well yeah if you count heat pumps that's another story. I was only thinking in terms of energy generation (usually from burning something or electrical resistance).

Thanks for the video, I think I saw that channel once and it was interesting so I look forward to watching it later. It's been a long time since my thermochem course so it'll be good to revisit some concepts.