DuraVent FasNSeal Firestop and Flat Flashing for W2: a floor plate sized for the wider outer wall
The DuraVent FasNSeal Firestop and Flat Flashing for W2 is a plate that covers the framed opening where a vent passes through a floor or ceiling. Order it 1 inch larger than the W2 vent size to fit around the outer wall. A 3 inch W2 vent, for example, takes a 4 inch plate. This is the single wall firestop listed again for use with a W2 run. It goes at each floor or ceiling the vent crosses, not at the roof. FasNSeal W2 is DuraVent’s double wall stainless steel vent for high efficiency gas boilers, furnaces, and water heaters, with an air space between its two walls.
Choose a plate size from 4 to 10 inches, plus 12, 14, and 16 inches. W2 has 1/2 inch of air between its stainless steel walls to shield heat and reduce the space needed around materials that can burn. DuraVent recommends it for home vent runs inside walls or between floor joists, as well as larger buildings. Using single wall pipe? See the DuraVent FasNSeal Firestop and Flat Flashing for single wall vents. The DuraVent FasNSeal Firestop and Flat Flashing for W2 ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:








































