Metal-Fab Type B-Vent 3" to 4" Housing Adapter d23.25 Your choice of natural gas

Your choice of natural gas or propane

This burner system includes an Oxygen Depletion System to quickly shut off the gas if room oxygen levels drop to unsafe levels

No locking bands or mechanical fasteners required

warrants its aluminum chimney lining systems for two (2) years from the date of end-user installation

Metal-Fab Type B-Vent 3" to 4" Housing Adapter d23.25 Your choice of natural gasType 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