DUCT TIGHTNESS TEST

As required in IL by the 2018 IECC, all forced air systems with ducts passing through unconditioned spaces (attics, garage ceilings, cantilevered floors, etc.) must be tested for leakage.  If the duct system has no exposure 'to outside', the system must still be sealed but leak testing is not required.  Check with your code official for the final word.  

The best time to test for duct leaks is as soon as the supply & return ducts are ‘roughed in’ – before they are covered by insulation & drywall.  This way leaks can be accessed and sealed easily.  If tested after finishes are installed, all wall grilles must be removed to better ensure a passing result.

 

Insight can also train your employees in cost effective duct sealing techniques (eg. use mastic – NOT foil tape) and can serve as the approved 3rd party to test for duct leakage.  Consult with Insight for cost saving strategies to build tight duct systems.

Obtain certificate of occupancy

Avoid common duct leakage issues

WHAT SETS INSIGHT APART FROM OTHER HOME INSPECTORS?

Insight's inspectors are thorough, honest, and want you to understand the condition of the home you are buying.  Our inspectors are experienced building analysts and energy raters, a level of evaluation beyond that of a typical IL licensed home inspector, and regularly evaluate high performance and Energy Star new homes.  Our inspectors will provide you with the most comprehensive home insight in the Chicago area.

WHAT INFORMATION DOES INSIGHT NEED?

  • Number of systems to be tested

  • Number of openings per system

  • Is a ladder necessary to reach any openings?

  • Is there electrical power on site?

  • Are we testing at Rough-in or Finish?

HOW LONG DOES IT TAKE?

Approximately 2 hours.

HOW MUCH DOES IT COST?

$350 for up to 3,000 sqft. $50 for each additional 1,000 sqft, and $50 for each additional furnace. 

WHEN WILL WE RECIEVE RESULTS?

Results are provided on-site or can be emailed.

CAN WE DO CONDOS, MULTI-UNIT BUILDINGS, OR COMMERCIAL BUILDINGS?

Yes, we can do condos and multi-unit buildings, we can do small commercial buildings as well.

LEARN MORE

You can learn more and sign up for our IL - Duct and Envelope Tightness (DET) Verifier training here. of a Duct Tightness Test