Hvac Duct Leakage Test

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.

Hvac duct leakage test.

Potential accuracy of flow measurements should be evaluated. 1972 2 nd edition 2012 122 pages. 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 system will need to achieve a leakage rate of less than 4 cfm cubic feet per minute per 100 square feet of the home.

This means that when we measure say 120 cubic feet per minute of duct leakage at 25 pascals written 120 cfm25 that number is a pretty good estimate of how much air leaks out of the duct system while it s. Why test ducts for lk leakage. 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. Getting to the ductwork in some homes is difficult or impossible for the average homeowner.

Contains updates to the expected leakage rates for ductwork constructed to the smacna hvac duct construction standards metal flexible duct leakage test procedures. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. For duct leakage testing the standard pressure used is 25 pascals which is close to the operating pressure of a typical duct system. The research also led to the development of the smacna hvac air duct leakage test manual 1st edition.

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. A duct leakage test duct testing can be performed at rough in before drywalling or post construction. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow. 2 hvac duct construction standards metal and flexible 1st edition 1985 hvac duct construction standard metal and flexible 2nd edition 1995 and the current smacna duct construction standard hvac duct construction standards metal and flexible 3rd edition 2005.

Ri trequirements us smacna hvac air duct leakagg e test manual first edition 1985 ashrae 90 1 proposed. Representative sections totaling no less than 25. In both cases the requirements are the same.