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
To everyone saying they are exactly 100% efficient, what about sound? Many heaters make a loud buzzing noise. Is this not energy being wasted? If not what provides the energy to cause vibration
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