THE SMART TRICK OF FLEXIBLE DUCT THAT NO ONE IS DISCUSSING

Joints of duct devices shall be created significantly airtight by way of tapes, mastics, liquid sealants, gasketing or other permitted closure units. Closure devices utilised with rigid fibrous glass ducts shall comply with UL181A and shall be marked181A-P for tension-sensitive tape, 181A-M for mastic or 181 A-H for warmth-sensitive tape. Closure s