Flue Walls Slant
Q: Inside my fireplace, about 29″ up from above the opening is the damper. Just below the damper and each of the four sides or slit type openings. I do not know why. Maybe for air? I just saw the picture from SH and that is what mine likes like except all 4 sides slant in. It is about 10×10 at the damper. – KT
A: Dear KT, Since the sides slant on all 4 sides we will have to do the install high or low. We can use a HEK extender and a small 12×12 Chimney Balloon to install above the damper, or we can use the ledge that is generally just on the lintel and install a larger 36×15 Chimney Balloon. The lower install is easier but the balloon may be slightly visible from the room. _ Jason