CKSFAN Commercial&Kitchen 18x14 Fireproof Ventilation Roof Fan HVAC High-Temp Access Door

Opening Size: 18" x 14" Door Size: 19" x 15". Meets NFPA 96 Standards. This grease duct access door consists of two layers of stamped, hot-dipped galvanized steel and a 16-gauge black iron backing plate that is strong and leak-resistant. Hi-Temperature ceramic fiber gasket (2300°F, 1260°C max) is permanently bonded to the outside panel of the Access Door to eliminate leakage. Zinc plated conical springs are installed between the inner and outer plates to facilitate opening, and the zinc coated wing nuts can be easily turned by hand. This ductmate access door features effortless opening and closing with no special tools required.