Duct Testing IECC 2009 (abbreviated and not a direct copy)
Joints and seams shall comply with Section M1601.4.1 of the International Residential Code.
Duct tightness shall be verified by either of the following:
Post construction test: Leakage to outdoors (using duct blaster and blower door) shall be less than or equal to 8 cfm per 100 sq’ of conditioned floor area or a total leakage less than or equal to 12 cfm pr 100 sq’ of conditioned floor area at 25 Pa across the entire system, including the air handler enclosure. All register boots shall be taped or otherwise sealed during the test.
Rough-in test: total leakage shall be less than or equal to 6 cfm per 100sq’ of conditioned floor area at 25 Pa across the roughed in system, including the air handler enclosure. All register boots shall be taped or sealed during the test. If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 4 cfm per 100sq’ of conditioned floor area.
Exception: Duct tightness test is not required if the air handler and all ducts are located within conditioned space.
Minimum R value for supply ducts in unconditioned attics is R-8. Supply ducts in all other unconditioned areas shall be a minimum of R-6.
$250.00 total duct leakage
$300.00 duct leakage to outside. (Use of BD and DB required)
Add $100.00 for each additional system.
All registers to be taped by client. If necessary, a $60/hr. charge will be added if the certified technician is asked to stay and help locate leaks and an additional $10/hr. will be added if the technician has a Hot Shotz associate with them to help find and fix duct leakage
A $70.00 fee and our regular mileage fee, of 1.00 per mile over a total round trip of 50 miles, will be charged to any job postponed on the scheduled day of the inspection or when arriving to the job and the system is not ready, the hourly rate would apply if HS must wait for the duct to be sealed.
402.4.2 Air sealing and insulation. Building envelope tightness and insulation installation shall be considered acceptable when tested air leakage is less than seven air changes per hour (ACH) when tested with a blower door at a pressure of 50 Pa. Testing shall occur after rough in and after installation of penetrations of the building envelope, including penetrations for utilities; plumbing, electrical, ventilation and combustion appliances.
New Construction: Initial test $300 up to 3000 sq’, 8 cents per sq’ over 3000 sq’ and the hourly rate to help locate leaks using Thermal Imaging and blower door if necessary.
50 pascals = 0.2005 IWC = 0.00725 psi.