Hvac Air Duct Leakage Test Manual

Includes a new educational chapter.

Hvac air duct leakage test manual.

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. It is table 4 1 on page 4 3 in the 1985 smacna hvac air duct leakage test manual and table 1 1 on page 1 11 in the 2005 smacna hvac duct construction standards. 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. 1 blower with speed control vfd to generate range of pressure flowrange of pressure flow 2 flow measuring devices flow grid flow station high flow flow grid flow station high flow orifice plate low flow.

Th is table is not an allowable leakage specifi cation but is often used as one. Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required. 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 test manual rs 35 10 cfr 434 403 2 9 3 sheet metal and air conditioning contractors national association smacna.

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. Representative sections totaling no less than 25. 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 of test apparatus and test setup and sample leakage analysis. It appeared in chapter 10 of the high velocity later high pressure construction standards and in chapter 8 of the balancing and adjustment of air distribution systems manual of 1967 vintage.

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. Smacna first published a procedure for leakage testing of so called medium and high pressure ductwork since january 1965. 1972 2 nd edition 2012 122 pages. Test apparatustest apparatus duct leakage test system consists of duct leakage test system consists of.

Potential accuracy of flow measurements should be evaluated.