DuraVent Type B Gas Vent Draft Hood Increaser h31.8 Burn time will vary on

Burn time will vary on wind and other conditions but approx burn time is 6-7 hours per fill

018″ Galvalume* DuraLock & DuraTab MH2848 Round 10" to 18" - See note 2 1 inch 100 feet 1″ larger than ID Inner –

No Intake or Exhaust Louvres

Heats up to 850 sq

DuraVent Type B Gas Vent Draft Hood Increaser h31.8 Burn time will vary onOverview DuraVent is the premier company in the venting industry. With a broad range of engineered venting products, DuraVent has earned its reputation as the industry leader by offering innovative, safe, and professional products for the HVAC and Hearth markets. Type B Gas Vent DuraVent's innovative system for a lock tight connection for Type B Gas Vent is called DuraLock. See the alignment indicators meet; feel the ends grasp together; hear the snap