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
they’re probably referring to sound and light emissions, if you put your head to something that consumes a decent amount of electricity you can usually hear it’s hum, though I wouldn’t recommend going to close to a high voltage electrical line though
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