insulation flame-and-smoke rating: verify the listed material insulation, liner, vapor barrier & condensation insulation flame spread smoke developed plenum listed duct wrap liner use only the insulation, facing, adhesive, tape, and accessories approved for the space and system; verify the listing instead of judging by appearance. the insulation system can affect smoke development, flame spread, contamination, and acceptance of the entire air-distribution installation. approved insulation submittal, project specification, product listing, ahj/inspector requirements can we verify this insulation system-including facing, adhesive, and tape-is approved for this space and application?