eli5: If most electronic appliances’ efficiency losses are through heat, does that mean that electric heaters are 100% efficient?

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Edit:

Many thanks for your input everyone!

Just to clarify, I don’t want to take into account the method of generating electricity or shipping it to the home, or the relative costs of gas and electricity. I just want to look at the heater itself! i.e. does 1500W of input into a heater produce 1500W of heat, for example? Or are there other losses I haven’t thought of. Heat pumps are off-topic.

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Anonymous 0 Comments

Sure are! Even the energy that doesn’t reach the heating element turn into heat. It’s paltry by comparison, but the heat in the cord delivering power escapes into the room it’s plugged into also. This actually leads to a protip: when you’re shopping for heaters, as long as they are the same wattage, the real big expensive ones work exactly the same as the smaller cheaper ones. The expensive ones with fans might actually heat the room faster because of the forced convection, but the cheaper one is consuming the same amount of power and will eventually heat the room to same temperature.

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