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

jareedo_2

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.

Ken_40

NFPA 54

is a code book that has all the venting/chimney tables you could want; as well as the generally accepted code book for all utilities and states - eitehr directly, or referenced.

The height of the chimney is as important as the dimensions.

There are also venting table/books that focus on ONLY chimney math.

If you give us the height from the lowest penetration, someone must have a 54 laying around that could quote the total input capabilities, although, horizontal connector dimensions (diameter, length and BTU input) play yet another aspect of the calulations.



To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Unknown

Online

If you index to NFPA 54 on this site, and wade through to the documents at the bottom of that page, it's online for free.

http://www.nfpa.org/aboutthecodes/list_of_codes_and_standards.asp

Timco

interior or extreior chimney makes a difference as well...different tables.

Tim

Ken_40

Thanks Noel!

You just saved us ~$40.

How's life at Laars?

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Unknown

couldn't be happier!

Just in time for Indian Summer, which ends today, I hear...

Noel

bob young

quick formula

i believe Frankie Wrench had a quick formula .. if i remember correctly D2x5= btu [1000 ]