All UDX Series vent pipe is double-wall galvanized steel. Each kit includes:
(1) 4’ section of "B" vent
(1) Wall thimble
(1) Cap
(1) Draft hood adapter
- For 125,000 BTU heaters or smaller, use 4" vent pipe
- For 150,000 - 250,000 BTU heaters, use 5" vent pipe
- For 300,000 BTU heaters or larger, use 6" vent pipe