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Change-Outs · AC, Furnace, Heat Pump

HERS / ECC testing for AC and furnace replacement

A straight system replacement in California still triggers Title 24 verification. For most change-outs that means duct leakage, airflow and refrigerant charge, done in a single visit once the new system is running.

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Ben connecting pressure gauges to an outdoor condenser to verify refrigerant charge

Why a change-out needs testing

Homeowners are often surprised by this one, and installers end up explaining it. When a permitted HVAC system is replaced, the state wants proof that the new equipment was installed to perform, and that the ducts it is connected to are not leaking a large share of the air into the attic.

The city inspector closes the permit only once the registered ECC certificates are in. That is the step we handle.

What we test on a typical change-out

Duct leakage on the existing ducts, airflow across the new coil, and refrigerant charge on split systems and heat pumps. Depending on the equipment and the Title 24 report there may be a fan watt check as well. For a single system it is one visit.

Old ducts are where change-outs fail. Connections that have not been touched in thirty years are the usual culprit, and that is worth knowing about before the homeowner hears it at final.

Built around the installer

We schedule around your install date, test once the system is running, and send the report and certificate the same day so you can call for final. Give us a lockbox code and you do not have to be there.

How it works

  1. 1Tell us about the job

    Address, scope, and where you are in the permit. Two minutes by phone or text.

  2. 2We schedule around your build

    Rough and QII while the framing is open, final once the system runs.

  3. 3Testing on site

    Calibrated equipment and a straight answer on the spot.

  4. 4Report and registration

    Report plus the signed CHEERS certificate, the same day.

Common questions

Do I need HERS testing just to replace an AC?

In most cases yes. A permitted system replacement in California triggers Title 24 verification of duct leakage, airflow and refrigerant charge.

Is it one visit or two?

Usually one, once the new system is installed and running.

Why do change-outs fail the duct test?

Usually the existing ducts. Old connections and crushed runs leak, and the new equipment does not change that.

Other tests we run

ECC TestingECC field verification in Los Angeles, formerly HERS testing. Title 24 TestingTitle 24 field verification for LA permits. Duct Leakage TestingDuct leakage testing for Title 24 permits in Los Angeles. ADU TestingECC / HERS testing for ADUs and garage conversions in Los Angeles.

Where we work

Full service areaThe San Fernando Valley and the rest of LA County. EncinoEncino is home base for us, so it is the area we can usually reach the fastest. Sherman OaksSherman Oaks is a few minutes from us, and a lot of our work is there: change-outs in older homes, remodels in the hills, and ADUs behind houses on the flats.. Studio CityStudio City jobs tend to be remodels and additions on older homes, and the testing has to fit around a crew that is already mid-project. Woodland HillsWoodland Hills sits at the hot west end of the Valley, where summer afternoons push air conditioning harder than almost anywhere else in LA. Van NuysVan Nuys is a mix of postwar single-family streets and small apartment buildings, and both show up on our schedule.

Need a test scheduled?

Call or text with the address and where you are in the permit. We will come back with a time and a price.

Call (310) 867-5591 WhatsApp ecctesting26@gmail.com