Q: Jason – I previously ordered a 9X9 Chimney Balloon and it works fine for the flue (size 8″ square). What I don’t like about it is that the flue is about 5″ higher than the 12″ X 16″ smoke chamber. So when I place the 9×9 Chimney Balloon in the flue I have to really reach to get a good fit. Instead of getting your Chimney Balloon extension rod I figure it would be best to try and get another him Chimney Balloon to fit the 12 X 16 area above the damper. As I mentioned the 12 X 16 area (smoke chamber?) has only a 5-inch height then the flue begins. So if I understand correctly order a custom 12 X 18 and this would seal the area above my damper (12 X 16 X 5) Thanks, DT
A: Hi DT, It is true that a lower install location makes putting in a Chimney Balloon much easier, so I agree a larger Chimney Balloon for the smoke chamber is the way to go.
A custom 12×18 Chimney Balloon would work well for a 12″x16″ area. Remember, a Custom Chimney Balloon requires a 14 day build time, but it is worth the wait to get the correct size. You could consider a stock 24×12 Chimney Balloon, but I am concerned there will be too much extra Chimney Balloon material if you went with this size. If you get a Chimney Balloon that is more than 6″ oversize the extra material can make the install more difficult.