Quote Originally Posted by jglass38
I am not sure what a gas heater is.
I am thinking they might be referring to a kerosene, natural gas or propane heater. They make them in all kinds of styles portable and garage style (wall mount) heaters. The only problem with them is they tend to give off carbon monoxide which can buid up and cause problems.

I agree with Jamie on the oil-filled radiator, it's lots cheaper too.