OPTION: Provide foil faced insulation in lieu of standard. Foil insulation shall meet or exceed the requirements stated above, and in addition, meet ASTM Standards C665 and C-1136 for biological growth in insulation. Insulation shall be lined with aluminum foil, fiberglass scrim reinforcement, and 30 pound kraft paper laminated together with a flame resistant adhesive. All exposed edges shall be sealed to prevent any fibers from reaching the air stream.
OPTION: Provide elastomeric Elastomeric foam insulation in lieu of standard. Insulation shall conform to UL 181 for erosion and NFPA 90A for fire,smoke and melting, and comply with a 25/50 Flame Spread and Smoke Developed Index per ASTM E-84 or UL 723. Additionally, insulation shall comply with Antimicrobial performance rating of zero, no observed growth, per ASTM G21. Polyethylene insulation is not acceptable.