•Vertical Direct Venting System With Add-on Condensing Heat Exchanger (Category IV) Installation
These installations utilize the boiler mounted blower to draw combustion air from outdoors and vent combustion prod- ucts to the outdoors.
UL
For certain installations, i.e. pool,
To prevent the condensation accumulation in the vent, it is required to install the horizontal portion of vent with a slight upward slope of not more than 1/4" per foot of horizontal run and an approved condensate trap must be installed per applicable codes.
WARNING:
WARNING:
Pressurized common vent installations should be engineered.
No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.
The Stainless Steel
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