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

Question

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.

In: 1063

Answer 1

Not only is that (pretty much true), that means that if you have a 1500 watt heater or cooking appliance from a long time ago, it’s just as efficient as anything you can buy today.

So if you dig the style of 1979 Crock Pots or space heaters, you don’t have to worry that the newest technology would save energy, like with other appliances, motors, etc.