Direct Vent Wall Pass Through

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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. More Information: 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" Show more