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MFC Series Boiler Vent and Combustion Air Guide
TAG-0080_OG
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GF-148-V
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3/29/2023
Technical Support
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(800) 526-0288
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Mon-Fri, 8 am - 5 pm EST Page 17 of
33
17.
Manifolded Ducted Combustion Air
For systems using manifolded ducted combustion ductwork, use the longest length of common
duct and the individual branch to the furthest boiler to calculate the pressure drop.
Figure 8a: Individual Vents
– Preferred Installations