Metal-Fab Type B-Vent 22" Tall Cone Flat Flashing d29 If the underside of your

If the underside of your mantel is getting a touch too hot

Collar Kit only

It operates with a bi-metal contact

MatriX Three-sided Bay Built-in Gas Fireplace - 41" x 26"

3" x 300" Aluminum Flexible Liner

Metal-Fab Type B-Vent 22" Tall Cone Flat Flashing d29 If the underside of yourType B Gas Vent products are tested and listed to UL 441 for approved gas appliances and feature our innovative twist lock connection and locking tab, eliminating the need for sheet metal screws. Metal Fab Type B Gas Vent combines hemmed flues and casings that maximize product durability and reliability and minimize installation time. Designed for versatility, Metal Fab Type B Gas Vent products 3" 6" adapt to major competing brands and when installed