PelletVent Pro is a venting system designed for stoves and inserts that use corn, pellet, and oil fuel. Its double wall, air-insulated design offers superior performance. Factory-sealed seams on all elbows, tees, and fittings. Dura-Vent has been recognized as the industry leader in venting systems for pellet stoves. PelletVent Pro requires 1" clearance to combustibles. Not what you're looking for? See all 3" pellet vent pipe. Typical PelletVent Pro Installations - Installation Instructions for PelletVent Pro.