Sterling Heights, Michigan
The original in-throat damper (1966) was rusted open and would have cost $1,200 to replace. The open chimney top allowed a mother raccoon with babies to nest there, and a cold draft in the family room. Installation took a half hour for both All Season Control Covers. Problems solved.
Two nine by thirteen flue tiles for one fireplace, two inches of flue tile exposed above the masonry cap. The mounting brackets were modified to accommodate the short flue tile (should be at least three inches), and the center drip edges of the Control Covers were cut off in order to lay flat on the flue tiles. Of course dual controls down to the firebox, one for each Control Cover.