
KOOTENAI COUNTY COMMUNITY DEVELOPMENT 451 GOVERNMENT WAY, COEUR DALENE, ID 83814 (208)4461070 DUCT LEAKAGE AFFIDAVIT PERMIT #: Please complete ALL fields below DUCT LEAKAGE TESTING IS NOT REQUIRED.
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How to fill out the Duct Leakage Affidavit - Kootenai County online
Completing the Duct Leakage Affidavit for Kootenai County is an essential step in ensuring compliance with building regulations. This guide provides a clear and user-friendly approach to filling out the form online, ensuring all necessary information is accurately recorded.
Follow the steps to complete the Duct Leakage Affidavit online.
- Click the ‘Get Form’ button to access the Duct Leakage Affidavit. This will open the document in the online editor for you to begin filling it out.
- Enter the permit number at the top of the form in the designated field, ensuring that the number matches the project you are working on.
- Fill in the project address where the duct leakage test is being conducted. This helps the authorities identify the specific location.
- Indicate the conditioned floor area in square feet, as approved in the project plans. This information is crucial for proper assessment of duct leakage rates.
- Specify where the test was conducted by entering the relevant location details in the provided field.
- Report any flow rings used during the test in the appropriate fields, clarifying if the duct testing was conducted during the rough-in or post-construction stage.
- Document the tester location and pressure tap location by filling in the corresponding fields to give clarity on where measurements were taken.
- You will need to calculate and input the test method and the maximum duct leakage allowed for your specific project. Use the formulas provided within the form for accurate calculations.
- Enter the amount of duct leakage recorded from the test results into the various designated fields, including post-construction and rough-in leakage rates.
- Mark the test results as 'Pass' or 'Fail' per the outcomes of your duct leakage testing.
- Certification is required—fill in your company name, technician name, and signature. Include the technician’s phone number, date of testing, and email address for verification purposes.
- Once you have completed all sections of the affidavit, review the information for accuracy. You can then save changes, download, print, or share the completed form according to your needs.
Complete your duct leakage affidavit online to ensure compliance with local building codes.
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Get answers to your most pressing questions about US Legal Forms API.
Why do I need a duct leakage test?
The purpose of duct leakage testing is to evaluate how well a home's duct system can hold air. The idea behind it is that the more air that leaks out of the duct system, the more potential energy loss can occur.
What is acceptable duct leakage CFM?
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.
What is a good score on a duct leakage test?
Duct Leakage Standards In the case where an HVAC or Home Performance contractor is installing a new duct system and new furnace, the duct leakage must be sealed to 6% or lower.
How do you calculate duct leakage percentage?
How to Calculate Duct Leakage? First, determine the duct design flow (CFM). Next, determine the allowable leakage percent (%). Next, gather the formula from above = DL = DF * AL / 100. Finally, calculate the Duct Leakage.
Is duct leakage a mandatory measure?
Testing air leakage in ductwork used for forced-air heating and cooling systems has been required since the 2012 International Residential Code (IRC). From 2012 through 2018, the IRC allowed a testing exemption for all ductwork located inside the building envelope.
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 today's design practices.
How do you calculate allowable duct leakage?
Percentage of System Volume Flow A percentage of volume flow is also a simple calculation for the testing contractor. For example, suppose you have a duct system where the duct system is handling 14,000 cfm. If the allowable leakage is specified as 2%, then the allowable leakage is 0.02 x 14,000, or 280 cfm.
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