Thank you all for you responses! I have an FPX large flush insert. I installed a block off plate with roxul about 2 years ago and noticed an improved difference. Although I did that, it is an external chimney so it is exposed to the elements. I have some room on top to the block off plate...maybe 2 feet. And I have room in the back, but not too much. I wanted to lay roxul on top of the insert to allow the cold masonry to not soak up the heat from my insert. Thanks!
Roxul
- Thread starter davo
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If you have insulation above the plate, then I don’t think adding more above the unit will be advantageous. Insulating around the unit, sides and back would be though. Your intake air comes in through the front. At least it was on the last 50 or so I installed.
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