> I've seen videos advertising magical electric heaters, which will "recycle" 85% of the energy used for heating and thus will save you lots of money. It's simple physics that warm air coming out at the front of such a device will be sucked in at its back again, but there's nothing to "recycle" here, to somehow save energy.
You sure they couldn't be talking about a heat pump which does have "above 100%" efficiency in a sense?
Why do you put that in quotes?
> I've seen videos advertising magical electric heaters, which will "recycle" 85% of the energy used for heating and thus will save you lots of money. It's simple physics that warm air coming out at the front of such a device will be sucked in at its back again, but there's nothing to "recycle" here, to somehow save energy.
You sure they couldn't be talking about a heat pump which does have "above 100%" efficiency in a sense?