Placed Fire Place Insert Wood Stove into Fire Place; how to minimize heat loss through former chimney damper opening?
In the past I have used rock wool , some high efficient wood stoves use this in the fire box over the heat tubes so it can handle the heat. Pack enough to seal the flue. In my state a fresh air source is required for new stove installs, depending on the stove some times channeling through the chimney or coming in through an old ash clean out chute will work, other times a vent in the wall is required. I prefer if possible to duct the fresh air directly into the stove this way there are no drafts.