They look like (and sometimes weigh as much as) a classic radiator. They heat a reservoir of oil, which gives out heat at a more gradual but longer-lasting rate. You can also get oil-free models, ...
That’s because, technically speaking, most electric space heaters put out the same amount of heat: 1,500 watts (about 5,110 BTU) on high and 750 watts (about 2,560 BTU) on low. They’re all ...