DuraVent FasNSeal W2 Appliance Adapter: connects a double wall vent to the appliance outlet
The DuraVent FasNSeal W2 Appliance Adapter is the adapter that connects a W2 double wall vent to an appliance’s flue outlet, where exhaust leaves the appliance. 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 your vent size on this page, from 3 to 16 inch. DuraVent lists the 10 and 12 inch adapters for Patterson Kelley Modu-Fire Series boilers, but that listing excludes the FD models.
W2 has a stainless steel outer jacket around the inner flue, with 1/2 inch of air between them to shield heat and reduce the space needed from materials that can burn. For a house, DuraVent points to W2 for vent runs inside walls or between floor joists. Looking for the version with a test port? See the DuraVent FasNSeal W2 Appliance Adapter with Test Port. The DuraVent FasNSeal W2 Appliance Adapter 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:








































