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How many appliances on a 8\" x 8\" masonry flue?

jareedo_2 Member Posts: 10
Hey Guys,

Does anyone know a formula or a place to find info on masonry chimney sizing or how many appliances can be vented on certain sized existing chimney.I have a customer that has a 100,000 btu boiler and a 40,000 btu water heater both nat. gas on a single 8"x8" flue ,she wants to add another boiler the cheapest way possible so a wall hung or direct vent is out of the question ,unless there's no way I can use the existing chimney.


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