Duct leakage class consult the hvac air duct leakage test manual and.
Hvac air duct leakage test manual pdf.
Schedule the pressure classes here by fan system num ber or portion thereof if they are not shown on the drawings.
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.
The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests.
Hvac air duct leakage test manual and table 1 1 on page 1 11 in the 2005 smacna hvac duct construction standards.
Prior to smacna hvac air duct leakage test manual 1985 two id i lidentical phases of a research b ildibuilding were bilbuilt by different contractors.
Th is table is not an allowable leakage specifi cation but is often used as one.
Iapmo uniform mechanical code duct leakage tests.
Mcgill airflow receives many inquiries each year from contractors who are performing leak tests in the fi eld wanting to know how to use this table to.
Hvac air duct leakage test manual author.
Sheet metal and air conditioning contractors national association subject.
Where no specific duct pressure class designations are provided byclass designations are provided by the designer the 1 water gage pressure class is the basis of.
Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required.
Quote fromquote from hvac air duct leakage testhvac air duct leakage test manual smacna.
Public domain created date.
This american national standard ansi smacna 016 2012 covers revised leakage criteria and builds on the proven methods for testing ductwork for air leaks from the first edition.
Potential accuracy of flow measurements should be evaluated.
Law in 10 cfr 434 403 2 9 3 keywords.
Duct seal class ducts shall be sealed as specified in the hvac dcs.
The hvac air duct leakage test manual has been incorporated by reference and is legally mandated by the united states in title 10 of the code of federal regulations section 434 403 2 9 3.
Issues of sealing duct to a leakage class and seal class case 1.
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.
Apparent differences of about ten percent between fan delivery and sum of airflow measurements at terminals do not necessarily mean poor sealing and excess leakage.
The ahu systems were dual duct.
Phase 1 by contractor a required.
