Hvac Duct Pressure Testing Equipment

Smacna hvac air duct leakagg e test manual first edition 1985 ashrae 90 1 proposed.

Hvac duct pressure testing equipment.

Testing includes the use of high technology viewing and recording equipment air pressure tests and an ocular inspection of your hvac equipment to determine the irregularities of your duct system. The only time duct testing is required is when parts of the hvac system are outside of the conditioned envelope. If any supply or return duct chases flexible lines or air handler units are in these areas by iecc 2015 code a duct leakage test is required. Test equipment personnel witnesses date location personnel.

Hvac contractors own a lot of equipment. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork. If the test is at 6 static pressure for leakage class 3 compliance i e 9 6 cfm per 100 s f with 6 orifice differential and 6 duct test pressure the meter could only indicate 24 cfm. However the blower for the test apparatus would have to produce 24 cfm at 10 to 12 static.

Test pressure higher than duct design i e. The first step in duct testing is closing all the vents to make sure that the only place that air pressure can go through is via leaks along the ducts. Duct pressure testing is a diagnostic procedure performed by a certified professional that measures the air tightness of a home s duct system. Our duct leakage testers are compliant with the following standards.

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. Eurovent 2 2 leakage rate in sheet metal air distribution systems. Testing duct leakage by pressurizing ducts can be traced back to smacna air duct leakage testing standards published in the 1960s. This includes areas like unconditioned attics garages and crawlspaces.

One piece that few contractors own however is a duct leakage tester. Commercial duct leakage pressure testing prospered for decades as a method of verifying one of many factors of hvac system performance. En 12237 ventilation for buildings ductwork strength and leakage of circular sheet metal ducts. En 1507 ventilation for buildings sheet metal air ducts with rectangular section requirements for strength and leakage.

One of the things that we do both in upgrades of existing homes as well as in new construction is duct pressure testing of the system s. Testing system designed for 2 in h 2o operation at 10 in h 2o.