ELI5. If an electric heater is not 100% efficient. Where is it losing its energy?

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Ok I get that some heater are more efficient at heating an area, person heater over space heater etc.

But sometimes
The efficiency gets quoted. And other than losing energy at heat (which seems fine) how else do they lose energy?

In: 30

11 Answers

Anonymous 0 Comments

From what I understand, it’s a semantics thing.

An electric light heater converts 100% of energy into heat and light, and as those are the byproducts you want, it’s technically 100% efficient.

However, things like – the cable and internal wires have resistance, where energy is lost as heat. You want heat, so that’s fine, but if that resistance didn’t exist you would have more heat in the places you want to have it.

So arguably they’re not 100% efficient too.

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