repair - Insulation exposed behind face of my fireplace - Home Improvement Stack Exchange

I recently had my house inspected and this was identified. I don't know if the previous owners used this fireplace regularly but it looks like the insulation between the face of the fireplace is ex

ENERGY SAVING: The fireplace cover can be tightly attached to the fireplace, effectively blocking the outdoor cold / hot air and achieving thermal

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Home Intuition - 12 x 24 Ceramic Fiber Insulation Blanket Sheet 1 Thick, Fire Rated 2500F Fireproof Insulation Blanket for Oven, Fireplace, Furnace, Gas Forge, Boiler, Pipe, & Dishwasher

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Just bought a new house - previous owner said the fireplace hasn't been used in 12+ years. Aside from needing a cleaning, how does this look? Safe to use? (More info in

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