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Inspecting HVAC Systems Topics include heating, venting, and air conditioning inspections.

 
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Old 9/17/11, 9:15 AM
Michael S. OMalley Michael S. OMalley is offline
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Default How many gas vents into 6" flue?
Max number of gas appliance vents connected to 6" stainless steel flexible flue liner? There are 2 small boilers and 2 50-gal water heaters manifolded into a 6" flue. What is the maximum capacity of such a flue in BTUs/hr or any other measure? Also, how should multiple appliance vents be manifolded to the flue? I know the smaller vent should be connected above the larger vent, but in this case they are all the same size.
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Old 9/17/11, 9:31 AM
James H. Bushart's Avatar
James H. Bushart James H. Bushart is offline
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Default Re: How many gas vents into 6" flue?
The gas code has a table of about 6 or 7 pages. Total btus and length are a part of the calculations. If you have a doubt, refer it to a qualified HVAC tech to evaluate and make the call.


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