This Imperial Joist Lining is a high-quality sheet metal alternative for capping off a return air run. The residential return air panning standard, is made from "no noise" corrugated insulation faced with aluminum. Each 16-in x 12-in joist header is pre-cut and scored to fit easily between joists and requires no shop fabrication for a more user-friendly choice. The header is lightweight and easy to install with staples or small nails, resulting in a tight plenum air seal when stapled as directed. The air space created provides a positive R-value of 5, and the liner is moisture-treated against dampness. Designed for ultimate safety, this fire-resistant joist header will not sustain combustion. It is performance tested to UL 723 Standard and has an ETL Class 1 fire rating with a flame spread index of 10 and a smoke index of 30. The high-quality header is an environmentally friendly choice made from recycled products.
Standard header used for capping off a return air run
High-quality sheet metal alternative consisting of corrugated insulation faced with aluminum
Reduces duct noise and labor
Precision die-cut and scored for easy installation
Lightweight and easy to install with staples or small nails; results in a tight plenum air seal when stapled as directed
Air space provides a positive R-value of 5
Performance tested to UL 723 Standard
ETL Class 1 fire rating with flame spread of 10 and smoke index of 30
Environmentally friendly liner made from recycled products