A:Answer The Classic Flame website says 5200. My house is a little over 1,100 square feet, so I thought this heater would heat my living room really well, but it takes a really long time (hours) to bring the temperature in the room to a comfortable temperature (meaning not cold, but not really warm either, just comfortable). I even close doors to the rooms I don’t want the heat to flow into. Although, I do have an older house that doesn’t have insulation.
