Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Sizing Vents

Gas exam; if I have a vent and I need to size it but my vent height is a number not on the tables in the code book. For instance my vent height is 13. Do I have to interpolate or use 10 or 15 or whatever is on the table?