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Testing Procedure Application: By pressurizing the interior of the home with a blower door while using a duct testing device, duct leakage to the interior is eliminated from the measurement. The test is designed to measure the CFM25 value for leakage in the duct system to outside of the conditioned space.
How do you perform a duct leak test?
Duct testing involves sealing off an entire ventilation system and then pressurizing it in order to determine how airtight it is. The technicians determine how much air pressure is escaping from the ductwork and then trace down the locations so they can repair or seal them.
What is the Ashrae standard for duct leakage?
ASHRAE Standard 90.13 (section 6.4. 4.2. 2) requires air leakage testing of 100% of all outside ductwork and 25% of representative sections of all other ductwork designed to operate at a static pressure in excess of 3- inch water gauge.
What is the acceptable duct leakage percentage?
When low-pressure VAV and CAV systems are used, the total allowable leakage should not exceed 2 percent, including the box and downstream ductwork. The box and downstream ductwork should be tested at the lower 1-inch wg static. This is the minimum for most systems currently used in todays design practices.
When performing a duct leakage test what pressure should be used?
This test is appropriate in new construction when ducts are to be tested at the rough-in stage before the house envelope is intact. The test measures the total collected leaks in the system at an induced pressure of 25 Pascals (PA).
Duct testing involves sealing off an entire ventilation system and then pressurizing it in order to determine how airtight it is. The technicians determine how much air pressure is escaping from the ductwork and then trace down the locations so they can repair or seal them.
What is the standard for duct leak test?
The test is designed to measure the CFM25 value for leakage in the duct system to outside of the conditioned space. Standard: The measured duct leakage must not exceed 0.06 CFM25 x floor area (in square feet) served by the system.
Related links
Duct Leakage Test NEW CASTLE COUNTY 2018 IECC
Jan 12, 2021 Duct Leakage Test. NEW CASTLE COUNTY. 2018 IECC Certification Form. DEPARTMENT OF LAND USE. 1/12/2021. 87 READS WAY, NEW CASTLE, DE 19720.
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