My mother says don't get cheap heaters, because it'll end up costing you more in power because they're inefficient.
How can a heater be inefficient? Where is the wasted energy going? If it turns into heat, that's not wasted energy. It's job is being a fucking heater.
I assumed my mum was just dumb and didn't understand science like I do, but when I got my power bill, she was right.
So, if energy can't be created or destroyed, where is the energy that goes into my inefficient heater going?