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We get a lot of heat/AC loss through our gas log fireplace. It has glass doors that we keep closed to help stop the air leakage, but we feel there must be something else we can do to reduce the inefficiency. Thoughts?
Have you tried shutting the flue AND the glass door?
To achieve zero loss will be almost impossible, IMO.
Yes, both flue and glass doors are shut (except, of course, when we have the gas log on).
Seriously, there's NOTHING that can be done to reduce the air leakage???
Get a direct vent fireplace, either gas or wood. OR otherwise permanently seal off the fireplace. They look nice, but natural draft fireplaces aren't very efficient hat sources and create drafts... as you have noticed.
Foil faced fibergalass does a descent job of sealing it off. Better is probably making up a piece of sheetmetal the shape of the flue opening and caulking it with silicone against the brick. Then just save-up for a direct vent fireplace in the future. They aren't cheap, but heat wonderfully!
Good suggestions -- thanks!
I just had my entire fireplace system from the basement to the top of the chimney cap replaced. Someone mentioned when not using the fireplace to get one of these. I haven't - in fact, I'm amazed they exist.