American Metal Gas Vent Storm Collar

Double-Wall Construction

Double-wall metal construction provides protection for health and safety, as well as benefits of economy, ease of installation, efficiency, and protection from property damage. Designers of vent systems should take particular note of the fact that vents constructed of brick, cement, asbestos, and mass-insulated metal require lengthy warm-up periods, whereas double-wall metal vents reach operating temperatures almost instantly for rapid removal of the flue gases.

Maintaining proper flue gas flow prevents pollution, and condensation damage. Although a large portion of the flue gas is composed of water vapor, Amerivent Type B gas vent carries it out before it can condense.

Fire Safety

One of the fire safety features of double-wall Type B gas vent is that its outer wall, insulated by the airspace beneath it, requires only 1” clearance to combustible material in the structure.

• The inner pipe of reflecting aluminum heats quickly, containing the warm flue gases inside.
• The airspace between the inner and the outer pipes provides insulation against heat loss to keep the warmer flue gases on the rise.
• The outer pipe of corrosion-resistant galvanized steel ensures strength, safety, and durability.

Usage 

Amerivent Type B gas vent is used for venting all Category 1 listed gas appliances having draft hoods and other appliances listed to be used with Type B Gas Vent. For information on venting unlisted gas appliances or appliances burning solid or liquid fuels, request our Amerivent Hearth catalog which includes All-Fuel Chimneys.