Metal-Fab Type B-Vent 16" to 22" Increaser 55in excellent infrared transmission

excellent infrared transmission

Model 952803460 Clearance UL and ULC listed to 1777 standard

The diaphragm is made of NBR (silicone)

We conducted extensive testing in accordance with the test protocol and procedure and determined when an Ecofan is used with a wood stove

Metal-Fab Type B-Vent 16" to 22" Increaser 55in excellent infrared transmissionType 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