Chimney in an indirect fired gas heater

[stern]

Hi guys,

Is there a specific formula to calculate the area of chimney needed to exhaust flue gases from a x BTU/hr gas heater?

If i need to provide more imformation please advice.

Thanks,

S

 

[dvd]

Read this:

http://nyb.com/Catalog/Letters/EL-10.pdf

and see section 1.3.4 of this document:

http://www.epa.gov/ttn/catc/dir1/cs2ch1.pdf

 

[stern]

Thank you dvd