AmeriVent Products

Vents

GRDs

Venting Products

Gas Vent Offsets
Gas Vent Termination

A printable version of both tables can be downloaded by clicking on the link below.

Printable Tables

All printable tables on this website are provided as PDFs. Adobe Acrobat Reader will be required to view any of the installation guides. If you do not have Acrobat Reader, go to www.adobe.com and download the latest version before proceeding.

Gas Vent Tables

Back to AmeriVent® products

Offsets with two 45° elbows and one length
Vent Size	With Two 45° Elbows ONLY	6" Length	12" Length	18" Length	24" Length	36" Length	48" Length	60" Length
3	3 ¼	6 ¾	11	15 ¼	19 ½	28	36 ½	45
4	3 ½	7	11 ¼	15 ½	19 ¾	28 ¼	36 ¾	45 ¼
5	4 ¼	7 ¾	12	16 ¼	20 ¼	29	37 ½	46
6	4 ½	8	12 ¼	16 ½	20 ¾	29 ¼	37 ¾	46 ¼
7	5	8 ¼	12 ¾	17	21 ¼	29 ¾	38 ½	46 ¾
8	5 ½	9	13 ¼	17 ½	21 ¾	30 ¼		47 ¼
9	6		13 ¾	18	22 ¼	30 ¾
10	7 ¼		15	19 ¼	23 ½	32
12	7 ¼		15	19 ¼	23 ½	32
14	8 ½		16 ¼	20 ½	24 ¾	33 ¼
16	9 ¼		17	21 ¼	25 ½	34
18	10		17 ¾	22	26 ¼	34 ¾
20	10 ¼		18	22 ¼	26 ½	35
22	10 ¼		18	22 ¼	26 ½	35
24	11 ¼		19	23 ¼	27 ½	36
26	12		19 ¾	24	28 ¼	36 ¾
28	12 ¾		20 ½	24 ¾	37	37 ½
30	13 ½		20 ¼	25 ½	29 ¾	38 ¼

Termination
Roof Pitch	Minimum Height	AmeriCap® in 3" - 12" sizes may be installed in accordance with the Gas Vent Termination Table if the vent is at least 8' from any vertical wall. For installation of caps 14" and larger, or for caps which are less than 8' from a vertical wall, the cap is to be located no less than 2' above the highest point where the vent passes through the roof and at least 2' higher than any portion of a building within 10'.
flat to 7/12	1.0 feet
over 7/12 to 8/12	1.5 feet
over 8/12 to 9/12	2.0 feet
over 9/12 to 10/12	2.5 feet
over 10/12 to 11/12	3.25 feet
over 11/12 to 12/12	4.0 feet
over 12/12 to 14/12	5.0 feet
over 14/12 to 16/12	6.0 feet
over 16/12 to 18/12	7.0 feet
over 18/12 to 20/12	7.5 feet
over 20/12 to 21/12	8.0 feet

Vents

Grilles, Registers, Diffusers