PelletVent is a complete venting system from DuraVent for stoves and inserts that use oil fuel or multi-fuels (including wood pellets, corn, cherry pits, switch grass, coffee husks, walnut shells, soybeans, wheat, sunflower hulls, rapeseed and sugar beets). The Cathedral Support Box is designed for cathedral ceiling installations and is compatible with most ceiling slopes, using an included support bracket to hold the pipe in place. For added durability, PelletVent seams are factory-sealed on all elbows, tees and fittings.