Gas Venting Installation Manuals
Make up Air for Combustion
Sizing Louvered Grilles
Minimum Required Volume of Air:
50 Cubic Feet Per 1,000 BTU’s (50 x CFH)
or L x W x H [max 8FT] x 20 = Total BTU’s Area Will Support
Excel Spreadsheet for Calculating Combustion Make Up Air & Common Vent Connector Sizing
Centrotherm InnoFlue Installation Instructions- Single Wall Rigid, Flex and Concentric Vent Systems:
Supports on pg. 6; Pitch on pg. 7 Must use rubberized clam shell supports.
Centrotherm Approval List of Appliance Manufacturers AND Appliance adapter p/n if required
Letter from Centrotherm regarding being used on Category 3 Appliances- from Inspector #44 Cont. Ed
Duravent PolyPro Installation Instructions- Pitch on pg. 8; supports on pg. 9
Letter from Duravent regarding polypro being used on Category 3 Appliances- from Inspector #44 Cont. Ed
SWG Powervent Installation Manual- clearances on pg. 5
SWG Powervent Troubleshooting and Maintenance Guide
Water Heater Control Kit Instructions
Fan in the Can CAS-34U Instructions
Fan in the Can CAS-34U BTU limits & Max pipe length chart from manual pg.4
SWG Powervent sizing chart
Gas Vent Damper Model GVD-4 thru 12 Instructions
Letter from IBC regarding no limit on exposed vent piping outside.
IBC Installation Manuals
System 1738
System 1738 Brochure
Flue Gas Venting Approved Appliance Manufactures List Effective Nov 2023
System 1738 Installation Manual-
Pitch on pg.3 (j.); Dryer clearance page 4 (d).; Supports on page 9 & 10; Unconditioned space on page 4.(c)
Letter from IPEX regarding attaching to unlisted PVC and CPVC- received from Jeff Damario, GEM Plumbing
System 1738 Pipe Product Update: April 10, 2024
Technical Service Bulletin Regarding Drilling into Pipe for Combustion Tests
System 636
System 636 Brochure
System 636 Installation Manual-Pitch on page 2 (k); Dryer clearance page 4 (i).; Unconditioned space on page 4 (k); Supports on page 6 & 7; Termination Clearances Page 25
E-mail from Walter Morris manufacture’s rep for Rheem and IPEX regarding venting Category 3 power vent water heater with IPEX System 1738
Letter from Rheem regarding venting with UL-1738 and 636 materials including PVC, CPVC and Polypropylene-received from Walter Morris, manufacture’s rep.
