Duct leakage class consult the hvac air duct leakage test manual and select appropriate allowable leakage.
Smacna duct leakage test form.
Hvac duct air leakage oct 10 2019 in a recent article which was published in rses journal smacna s senior project manager pat brooks pe discusses the history of duct air leak testing and describes proper techniques and practical applications when leak testing is performed in accordance with smacna standards.
If field leak tests are required appr opriate test pressure and clear scope of testing must be specified.
When the designer has only required leakage tests to be conducted in accordance with the smacna hvac air duct leakage test manual for verification that the leakage classifications in table 1 have been met and has given no other criteria and scope he is deemed to have not fulfilled the responsibilities outlined in section 2 1 for providing a.
Figure 5 1l from the 2012 smacna hvac air duct leakage test manual shows the allowable leakage as a function of duct leakage classification and static pressure in the duct.
Hvac air duct leakage this article discusses the history of duct air leak testing and describes proper techniques and practical application when leak testing is performed in accordance with the sheet metal and air conditioning contractors national association smacna standards.
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Us duct leakage testing ri trequirements smacna duct class 1 2 inwg 3 inwg 4 6 10 inwg seal class cb a sli t transverse joints seams sealing applicable ransverse joints only asvese joints and seams jo s sea s and all wall penetrations leakage class c l cfm leakage per 100 ft2 1 in h 2 o rectangular metal 24 12 6 round.
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If different from above street.
Resource hvac air duct leakage.
Example blank form duct leakage test form customer information.
Contains updates to the expected leakage rates for ductwork constructed to the smacna hvac duct construction standards metal flexible duct leakage test procedures recommendations on use of leakage testing types.
Duct liner metal nosing shall be used on leading edges of each piece of lined duct when the velocity exceeds 4000 fpm.
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