DuraVent FasNSeal Flex 3" x 170' Stainless Steel Custom Flex Length btu850000 so it delivers the optimum

so it delivers the optimum amount of heat

with GFRC construction

High-density steels make the heater excellent in heating conductivity and hard to get deformed

B-Vent Floor Furnace

Model BHD4PN Max

DuraVent FasNSeal Flex 3" x 170' Stainless Steel Custom Flex Length btu850000 so it delivers the optimumMade from super ferritic stainless steel. Corrosion resistant. Manufactured with a sure seal locking seam for superior strength and flexibility. The smooth inner wall provides for no output reduction, allowing for full appliance efficiency, ease of cleaning and regular maintenance. The smooth inner wall optimizes gas flow, minimizes back pressure, and facilitates condensate management. Only flexible chimney liner listed to UL 1738 standard. What's