ECC testing, registered and signed off
Duct leakage, blower door, refrigerant charge, airflow and QII verification by raters certified through a CEC-approved ECC-Provider — with results registered to an approved data registry.
Formerly known as HERS. On 1 January 2026, with the 2025 Energy Code, the CEC replaced the field verification and diagnostic testing part of the HERS Program with the Energy Code Compliance (ECC) Program. HERS Raters are now ECC-Raters and HERS Providers are now ECC-Providers. The testing is identical — only the name changed. Whole-house HERS ratings and home energy audits continue separately under the HERS Program, and documents from earlier code cycles still say “HERS”.
Duct leakage testing
Where ducts run outside conditioned space, the compliance model almost always depends on their leakage rate, and that rate has to be measured rather than assumed. We test to the applicable target, and where a system fails we tell the contractor specifically where it is losing air instead of simply reporting a number.
Blower door / envelope leakage
Whole-building air leakage testing where the compliance model relies on a specific infiltration rate. Increasingly common as envelope performance carries more of the compliance burden under recent code cycles.
Refrigerant charge & airflow
Split-system verification covering refrigerant charge, system airflow and fan watt draw. Undercharged systems are extremely common, and they fail both the verification and the occupant's expectations of the equipment.
Quality Insulation Installation (QII)
QII is worth real compliance credit and it is the measure most often lost, because it requires inspection during construction rather than after. Insulation has to be verified before it is covered. Miss the window and the credit is gone — which usually means remodelling the whole compliance approach.
Schedule QII early. It needs a site visit at framing and again before drywall. Tell us your construction programme when we issue the report and we will book it into the sequence rather than chasing it later.
Registration
ECC-Raters are certified through a CEC-approved ECC-Provider, and verification results are registered with an approved data registry. Registered documents are what the building department actually checks at final — an unregistered PDF is not compliance.
ECC verification pricing
- Single-family, full scope — from $250
- ADU — from $200
- Multifamily — per unit, quoted by count
- QII (two visits) — from $325
- Re-test after remediation — from $150
Field verification requires a site visit, scheduled regionally across Southern, Central and Northern California.
Schedule verificationWe did not write your CF1R?
Not a problem. We perform verification on projects documented by other consultants routinely. Send us the CF1R and we will confirm exactly which measures need testing.
Need a permit-ready report this week?
Same-day reports available. Send the plans, tell us the deadline, and we will work to it.