Enervex 
Enervex RSV
Sizes: 450 – 4,000 CFM
Mechanical boiler draft fan used with condensing and non-condensing gas-fired boilers and water heaters. It is installed at the chimney termination point where it ensures a mechanical draft (negative pressure) in the entire chimney or stack system. Cast aluminum housing and impeller.
Enervex IPVB
Sizes: 500 – 6,000 CFM
Inline boiler exhaust fan used in with condensing and non-condensing gas-fired boilers and water heaters. It is installed in the chimney flue system where it ensures a mechanical draft (negative pressure) in the entire chimney or stack system.Stainless steel housing (316L) and cast aluminum impeller.
Heat-Fab 
Heat-Fab EZ Seal
Sizes: 3″ – 16″
AL 29-4C stainless steel special gas vent. Negative and positive pressure vent systems.
Heat-Fab CI Plus
Sizes: 4″ – 16″
AL 29-4C stainless steel (inner) special gas vent. 1″ gap between inner and outer. Pressure up to 15″ w.c.
Security Chimney 
Security Chimney SS, SSD, & SSID
Sizes: 3″ – 24″ Single or Double Wall Stack
SS is single wall, SSD is double wall with a 1″ air gap, and SSID is double wall with 1″ insulation. Material is AL29-4C.
Selkirk 
Selkirk PS & IPS
Sizes: 5″ – 48″
PS stack is double wall is a 1″ air gap & IPS stack is double wall with 1″ insulation. Available as 304 stainless inner / aluminized steel outer (304/AL), 316 stainless inner / aluminized steel outer (316/AL), 304 stainless inner / 304 stainless outer (304/304), & 316 stainless inner / 316 stainless outer (316/316). Options include C1, C2, & C4.
Duravent 
Duravent Polypro
Sizes: 2″ – 8″
Polypropylene venting system, suitable for use up to 230F and 15″ w.c.
Heat & Power Products, Inc. represents the following quality manufacturers.
