Harman Direct Vent Wall Pass Through Thimble with OAK- 3" & 4" Pellet Vent Pipe: 1-00-677177

This direct vent wall pass-through thimble is made by Harman and is listed as a compatible venting component for Harman pellet stoves and inserts when using Simpson Pellet Vent Pro pellet venting. Venting and 3" OAK hose sold separately. The exhaust opening will accommodate both 3" and 4" vent diameters and a 3" outside air flex hose. The term "direct-vent" means that this thimble supports exhaust venting AND an outside air connection all in one Supports the outside air temperature probe for stove models with a touchscreen controller Requires only one narrow opening for installation, 7 1/4"~7 1/2" square Tough 316T stainless exterior with low profile intake hood Can accommodate a nominal wall thickness between 4" and 10 5/8"