A merry Christmas to Jeff & all: If you want absolute safety from a space heater, the "Ecotherm" direct vent space heater is what you need. These natural gas and propane units draw air from OUTSIDE, and expel exhaust to the OUTSIDE. This keeps de-humidification to a minimum, and they don't deplete oxygen supplies in the home. Please e-mail or call me, and I'll send you some info right away. Please call Brian at 800 851 9891. We also supply electric, natural gas & propane, tankless water heaters. Sorry for the mild spam, I couldn't help myself. Have a wonderful Christmas everyone. Brian.