DuraVent DuraTech Wall Thimble: a sleeve for the chimney’s passage through a wall
The DuraVent DuraTech Wall Thimble is a two part sleeve for a chimney passing sideways through a wall. It keeps a 2 inch air gap between the chimney and anything that can burn, including framing and insulation. The halves slide to fit walls 5 1/2 to 9 1/2 inches thick. A shop made extension between them accommodates walls up to 16 inches thick. DuraTech is DuraVent’s double wall chimney, an insulated pipe with a 1 inch wall that takes over from the stovepipe at the ceiling or wall and runs up past the roof.
An insulating blanket between the stainless steel liner and galvalume or stainless steel outer wall keeps the outside cool and the inside hot to help smoke rise. Chimney pipe must pass through this sleeve and reach 6 inches into the room, never single wall stovepipe. The inside trim is painted black. Choose a 5, 6, 7, or 8 inch size to match your chimney. Stainless steel outside trim is optional for 6 and 8 inch sizes. Want insulation in the sleeve itself? See the DuraVent DuraTech Insulated Wall Thimble. The DuraVent DuraTech Wall Thimble ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








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