Figure # 9
UL Listed Cap
Required
B type double wall vent with double wall connectors is required for category I, serving two or more gas appliances.
Exhaust venting outlet
Condensate
Tee
Steam Outlet
Condensate tee and trap must be installed. Take the condensate to a floor drain or a condensate pump.
Trap
Category I gas appliance uses B type venting. Follow local and/or national codes for venting installation.
Note: These are guidelines only. Follow local and/ or national codes in your respective area.
For any vent lengths over 20 feet long, insulate the vent pipe to reduce the amount of condensate that could form in the flue gases.
When the venting passes through a cold area, or location that has large amounts of air passing over the venting, it should be insulated to prevent condensation from forming inside the venting.
Vent pipe passing through walls, floors, and ceilings, must be installed with the proper clearances from combustible materials, and venting manufactures fire stop equipment.
The venting shall not pass through any circulation air duct or plenum.
WARNING: Provide a screen or barrier to prevent personal injury in areas where personnel may come into contact with hot vent pipes.
A drip “T” or flue box condensate port should be used for condensate removal. When a condensate drain is used it will be necessary to install a trap to prevent flue gases from escaping.
Install a trap with a minimum 12” standing water column.
Prior to activating the appliance, ensure that the trap is filled with water and that the drain terminates in accordance with local plumbing codes.
Never vent into a unlined masonry or concrete chimney.
Chimney or vent should extend at least 3’ (1 m) above a roof and at least 2’ (.6 m) above any ridge within 10’ (3 m) of the chimney. Local codes apply.
Install venting so as to prevent accumulation of condensate and have a means for condensate removal.
Plastic, PVC, CPVC and HTPV special gas vents are not approved for use with this appliance.
The vent must terminate at a sufficient height above the roof to prevent blockage by expected snowfall.
