what is the minimum permissible aileakage rate for low pressure HVAC system? please can anybody help

[tcihvacff1]

please reflect your experience on this & i would appreciate if some one give me the procedure of doing air leak test...Thanks!

 

[willard3]

Check SMACNA for leak testing and proceedures.

 

[tcihvacff1]

yep willard3! i know that, but can u help me by mentioning the appropriate SMACNA version...

 

[willard3]

You may have to do some search yourself.

 

[KiwiMace]

Smacna does print several books, but I think the one you need is the 'HVAC air duct leakage test manual'. Well, seems almost obvious when you write it out like that.

 

[willard3]

My point precisely, Kiwi.

 

[urgross]

Without much research, I'd guess the minimum permissable leakge would be zero. Doubt that would be in the SMACNA manual.

 

[txdilbert]

You are allowed a certain percentage of leakage based on the pressure class and seal class of the ductwork in question. For example, seal class B ductwork allowable leakage rates are more stringent than seal class C. This info is in SMACNA, as mentioned above.

 

[urgross]

SMACNA provides maximum leakage. I'd also recommend looking at ASHRAE 90.1 for maximum leakage if you have to follow any energy code.

 

[tcihvacff1]

thanx all!!