Duct-Leakage Testing

A duct-leakage test pressurizes the duct system with a calibrated fan while the registers are sealed, and the airflow needed to hold a defined pressure is the leakage figure. Depending on the setup, the test measures total leakage from the ducts or only the leakage that escapes to outside the conditioned space. The code, rating or program determines which measurement is required and what result is acceptable.

No. Load and equipment-sizing review is a separate engineering task. We coordinate the two when the project needs both, and we keep them distinct in the record so a sizing question is never answered with a leakage number.

Potentially. Accessibility, the configuration of the system, occupied conditions and the intended method determine what can be measured. Sealing every register in an occupied apartment is a different undertaking from testing an empty one at rough-in, so we tell you what is feasible before we schedule a visit, and what an existing-building result can and cannot support.

Yes. We arrange hands-on testing and documentation instruction separately for suitably qualified staff, so your team learns the setup, the procedure and the record-keeping together. The instruction is a separate engagement from the testing itself, and we define it that way.

No. They answer different questions and can require different setups. The governing code or program determines which measurement is required, and the test report identifies clearly which one was measured, so the result is never compared against the wrong criterion.

A duct test evaluates the duct system under a defined pressure condition. A blower-door test evaluates the building enclosure. We often coordinate both on the same project, but their results are not interchangeable and each is reported on its own terms. A tight house with leaky ducts, or the reverse, is exactly the situation the two tests together are meant to reveal.