Gentlemen,
There are two new web interpretations that may affect you.
Envelope Sealing (common question mostly from electrical contractors, but affects mechanical contractors also)
http://www.ncdoi.com...enetrations.pdf
Duct tightness testing – Replacement scenario
http://www.ncdoi.com...nt Ductwork.pdf
I hope all is well,
Daniel Dittman, PE, CMVP
919-661-5880 x237
NC DOI
Chief Mechanical Code Consultant
Online 2012 NC Codes-
http://www.ecodes.bi...olina_main.html











