HERS ECC Title 24 Group

Services, in Plain English

Which tests your project needs depends on what your permit covers; your Consumer Information Form will list them before we start. Here’s what each one means.

Duct leakage test

We seal the vents, pressurize your duct system with a calibrated fan, and measure how much air escapes. This proves your system delivers air to your rooms — not the attic.

Airflow & fan efficiency

A system can be leak-free and still starved for air. We measure how much air moves and how much electricity the fan draws to move it.

Refrigerant charge

Wrong refrigerant level means poor cooling, higher bills, and early equipment failure. We verify the charge matches manufacturer specifications.

Blower door test

A calibrated fan in an exterior doorway reveals how much outside air sneaks in through gaps and cracks. Required on many new homes and additions.

Ventilation & IAQ

Tightly sealed modern homes need mechanical fresh air. We verify your ventilation delivers the airflow the code requires so the house stays healthy.

Insulation quality (QII)

For new construction and major projects: inspections at framing and insulation stages confirming no gaps, voids, or compression — the R-value you actually get.

Exemptions exist. Some duct systems are exempt from leakage testing — for example, systems previously tested and certified, very short duct runs, or ducts sealed with asbestos-containing materials that shouldn’t be disturbed. Exemption still requires documentation at final inspection, and we prepare it. If you think your project qualifies, ask us before paying for a test you may not need.

Not sure which tests you need? Call us — we’ll tell you straight.