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Method statement for duct smoke test pdf

Duct air leakage test report 2025

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The document is a Duct Leak Test Form used for verifying leakage control in duct systems at the McMurdo Palmer South Pole Station. It outlines the conditions under which leakage tests are necessary, specifies testing procedures, and provides sections for recording test results, including allowable and measured leakage. The form emphasizes the importance of proper assembly and sealing to minimize testing costs and refers to additional resources for detailed information on duct leakage testing.

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What are the standards for air leakage testing?

0.40 CFM/ft2 = Standard Practice 2021 International Energy Conservation Code (IECC) requires building thermal envelope testing in ance with ASTM E779, ANSI/RESNET/ICC 380, ASTM E3158, or ASTM E1827 such that the measured air leakage shall not exceed 0.40 CFM75/ft2.

What is a good number for leak down test?

Ideal leakdown numbers are 2 to 4%. Normal, but still indicative of a good engine are in the 6 to 10% range. 12 to 20% are signs of a wearing engine, but not yet one that needs to necessarily be rebuilt, but its coming up, its not going to get any better. You need to be careful how you interpret these numbers though.

What is a good score on a duct leakage test?

The ENERGY STAR Version 3 Rev 11 air leakage criteria specify that duct air leakage must be 4 CFM25 per 100 ft2 of conditioned floor area or 40 CFM25, whichever is greater, at rough-in or 8 CFM25 per 100 ft2 of conditioned floor area or 80 CFM25, whichever is greater, at final.

How do you test for leaks in air ducts?

Turn your HVAC system on and return to the areas where ductwork is accessible. Check the connections between each section of duct, placing your hand over the metal. If you feel air against your hand, the connection is loose and there is an air leak. A common place for leaks is the duct joints.

How much duct leakage is acceptable?

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.