|Procedure with TEC Duct Blaster|
The code is now three times more stringent than it was last week. Gone are the days of passing a total leakage duct test by chance. We are now required to make a whopping 4CFM / 100 SqFt., or 4% leakage rate. One must take careful attention to seal all seams with UL Listed mastic in order to reach this goal. The fortunate alternative is that if all ducts are in conditioned spaces, they do not have to be tested!
Anyhow, take a look at the attached document I created, I think it will help those that are just becoming involved with Duct Testing in MA. Also, please share your experiences with the local city and town requirements by commenting below - nobody likes to be surprised.