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.
The Amerivent System
Amerivent Type B gas vent uses a double wall of metal pipe for insulation and safety. 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.
If the flue gases are kept rising at the proper rate, the structure is kept free from pollution, and condensation damage is eliminated. Although a large portion of the flue gas is composed of water vapor, Amerivent Type B gas vent carries it out of the structure before it can condense.
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.
Amerivent is a complete gas venting system, from 3” to 30” pipe diameters in 7 different pipe lengths, to single- to multi-appliance hook-ups. The Amerivent gas vent line allows you to create almost any system from our more than 350 coordinated parts. Featuring Snap-Lock joints that are quick and easy to disconnect, the Amerivent Type B gas vent system is lightweight with no sacrifice in strength, and is available in large sizes, adjustable components, and multi-story Type BW venting installation.
Specifications and Dimensions
Available Pipe Sizes and Lengths
Round
Sizes: 3”, 4”, 5”, 6”, 7”, 8”
Lengths: 6”, 12”, 18”, 24”, 3’, 4’ (except 8” size), 5’
Sizes: 9”, 10”, 12”, 14”, 16”, 18”, 20”, 22”, 24”, 26”, 28”, 30”
Lengths: 12”, 18”, 24”, 3’
Oval
Sizes: 4”, 5”
Lengths: 6”, 12”, 18”, 24”, 3’, 4’, 5’
Size: 6”
Lengths: 6”, 12”, 18”, 24”, 3’
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.
Material
Inner Wall: Aluminum Alloy 1100, 3003, or 3015
Outer Wall: Galvanized Steel
