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E12A/R18A — Type B Gas Vent Adjustable Length

How to Specify

Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design. The System Design and Installation Guide is an additional resource.

Amerivent FAQs

E12A/R18A — Type B Gas Vent Adjustable Length

Sizes for 12" lengths: 3" through 8", adjustable from 3" through 10" Sizes for 18" lengths: 9" through 12", adjustable from 3" through 16" Sizes for 18" lengths: 14" through 30", adjustable from 5" through 16"

Adjustable lengths telescope onto standard AmeriVent pipe sections.

Available sizes (inches)

ModelSize
3E12A3"
4E12A4"
5E12A5"
6E12A6"
7R12A7"
8R12A8"
9R18A9"
10R18A10"
12R18A12"

Available sizes (inches)

ModelSize
14R18A14"
16R18A16"
18R18A18"
20R18A20"
22R18A22"
24R18A24"
26R18A26"
28R18A28"
30R18A30"