Hvac Air Duct Leakage Test Manual Pdf

Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required.

Hvac air duct leakage test manual pdf. 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. 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. The hvac air duct leakage test manual has also been incorporated by reference and is required by law in title 19 new york. Duct seal class ducts shall be sealed as specified in the hvac dcs.

Ductwork that is designed to operate at static pressures in excess of 3 inches water column 0 75 kpa and all ductwork located outdoors shall be leak tested according to the ansi smacna hvac air duct leakage test manual. Schedule the pressure classes here by fan system num ber or portion thereof if they are not shown on the drawings. Law in 10 cfr 434 403 2 9 3 keywords. 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.

Hvac air duct leakage test manual and table 1 1 on page 1 11 in the 2005 smacna hvac duct construction standards. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. 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. Phase 1 by contractor a required.

Duct pressure classes are to be identified on the contract drawings. Issues of sealing duct to a leakage class and seal class case 1. Quote fromquote from hvac air duct leakage testhvac air duct leakage test manual smacna. Th is table is not an allowable leakage specifi cation but is often used as one.

Hvac air duct leakage test manual author. Potential accuracy of flow measurements should be evaluated. 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. Iapmo uniform mechanical code duct leakage tests.

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. Public domain created date. Duct leakage class consult the hvac air duct leakage test manual and. 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.