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Space the stand-offs centrally, approximately 2 or 2-1/2 feet apart. Ensure that the unit is not unstable. 3) For exterior walls, insulate the enclosure to the same degree as the rest of the house, apply vapour barrier and drywall, as per local installation codes. (Do not insulate the fi replace itself.) Excalibur® P95-3 Zero Clearance Direct Vent Gas Fireplace Excalibur® P95-3 Zero Clearance Direct Vent Gas Fireplace 9 INSTALLATION Fireplace Stand No hearth is required when the unit is raised 3