Where does the insert obtain its combustion air?
The combustion air and its oxygen, needed to burn the wood or provide oxygen to the gas log, is provided by air drawn down the chimney. Nice warm room air is not used for combustion. This feature is one of the keys to the efficiency of the Meridian insert. You are not wasting warm room air to feed oxygen to the fire. To do so would displace this warm room air and replace it with cold air drawn from outside your home.
