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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 10 months ago by cheese_greater@lemmy.world to c/asklemmy@lemmy.ml

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[–] LastYearsPumpkin@feddit.ch 5 points 10 months ago (3 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 10 months 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 10 months 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.

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