DuraVent Round Type B Gas Vent Model BV 3" x 4" Increaser h38.75 Only one hole on the

Only one hole on the back

Reflective Panels

Square Cover (61852)

The HeatFlo™ system is designed to redirect the convective heat of the fireplace from the front of the unit

DuraVent Round Type B Gas Vent Model BV 3" x 4" Increaser h38.75 Only one hole on theOur non positional lock system on the Duravent BV Gas Vent is the best lock system on the market today. The incorporation of the DuraTab feature simply improves our lock system by adding flexibility and meeting market needs. The BV line of Duravent round vent pipe and fittings is designed for use on approved gas appliances in residential and light commercial and industrial applications. What's Included (1) Increaser Features Use to increase vent