I converted a wood burning fireplace to gas logs. My question is what is more efficient? Keep the glass doors closed or open? The conversion doesn't have a blower.
I always thought if you have the doors open, it draws heat from the furnace up the flue. The gas fireplace doesn't heat the house, just the living room, so the furnace does run while the fireplace is going. But, it doesn't really throw a lot of heat out with the glass doors closed.