Direct Vent Wall Pass Through SACK Features :

Features :

Aquascape BioBalls Biological Filter Media supports effective biological filtration by providing textured surface area for beneficial bacteria to grow and colonize

Rainscreen is required for all exterior installations

non-woven geotextile made from polypropylene also allows for any gases to escape properly

If not properly cleaned

Direct Vent Wall Pass Through SACK Features :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