> Hart&Cooley. SUBMITTER DRAWING install confidence 4 MIL POLYETHYLENE VAPOR BARRIER FIBERGLASS INSULATION CORE GORE *Two plies of black polyester film encapsulate a steel wire helix. Rated [pressures (UL=181): 12 In. W.C. positive, 3/4 In. W.C. negative & 1/2” W.C. negative *Recommended maximum operating pressures (ADC Test FD 72-R1): 6 in. W.C, positive for 12 in. diameter and under. 4 in, W.C. positive for 14 in. diameter and over. *Rated maximum air velocity: S000 FPM. THERMAL CHARACTERISTICS *R—8.
