PelletVent is a venting system for stoves and inserts that use multi-fuels (including wood pellets, corn, cherry pits, switch grass, coffee husks, walnut shells, soybeans, wheat, sunflower hulls, rapeseed, and sugar beets) or oil fuel. The DuraVent PelletVent Cathedral Support Box provides a vent pass-through for a cathedral ceiling and covers and protects PelletVent and multi-vent pipe to help keep combustible objects from touching the vent and igniting. Providing exceptional performance with factory-sealed seams and stainless steel construction for long-lasting durability and reliability, a bracket is included that attaches to the vent pipe to hold this support box securely in place.