CF3R-MCH-20-H ↗Duct leakage diagnostic test
Measures leakage from the duct system using calibrated test equipment for applicable new and existing systems.
2025 TITLE 24, PART 6 · ECC FIELD VERIFICATION & DIAGNOSTIC TESTING
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More than a duct test.
Our ECC/HERS services follow the measures identified on the approved 2025 Title 24, Part 6 compliance documents. The exact verification required depends on occupancy, project scope, compliance approach, equipment, and the registered project documents.
Mechanical & HVAC
Space-conditioning verification
Diagnostic and visual measures for ducts, airflow, fans, refrigerant, equipment, filters, and specialized HVAC systems.
CF3R-MCH-21-H ↗Duct location verification
Verifies applicable duct location requirements or compliance credit conditions.
CF3R-MCH-22-H ↗Fan efficacy
Measures electrical power used by the air-handler fan in relation to delivered airflow.
CF3R-MCH-23-H ↗System airflow rate
Measures airflow through the space-conditioning system using an approved diagnostic procedure.
CF3R-MCH-24-H ↗Building air leakage worksheet
Applicable mechanical documentation connected to building or dwelling-unit enclosure air-leakage testing.
CF3R-MCH-25-H ↗Refrigerant charge verification
Verifies refrigerant charge using the applicable procedure and operating conditions for eligible cooling equipment.
CF3R-MCH-26-H ↗Rated equipment verification
Confirms installed space-conditioning equipment matches the rated equipment and approved compliance documents.
CF3R-MCH-28-H ↗Return duct & filter sizing
Verifies return-duct design and air-filter device sizing under the applicable Part 6 tables.
CF3R-MCH-29-H ↗Duct surface area, R-value & buried ducts
Verifies conditions used for applicable duct-area reduction, insulation, or buried-duct compliance credit.
CF3R-MCH-30-H ↗Central fan ventilation cooling
Verifies applicable Central Fan Ventilation Cooling System components and performance.
CF3R-MCH-31-H ↗Whole-house fan airflow & efficacy
Measures whole-house fan airflow and fan efficacy where this measure is required.
CF3R-MCH-33-H ↗Variable-capacity heat pump
Verifies eligible variable-capacity heat-pump equipment and applicable compliance-credit conditions.
Ventilation & exhaust
Indoor air quality and local exhaust
Verification of whole-building ventilation and local exhaust systems, including kitchen range hoods.
CF3R-MCH-27-H ↗Indoor air quality & mechanical ventilation
Verifies required whole-building ventilation equipment, controls, and delivered airflow.
CF3R-MCH-32-H ↗Kitchen range-hood verification
Measures or verifies local mechanical exhaust airflow and applicable sound/label information for kitchen range hoods.
CF3R-MCH-32-H ↗Bathroom & local exhaust
Verifies applicable local mechanical exhaust fans serving bathrooms and other required spaces.
Airflow diagnostic ↗Installed exhaust airflow
Uses approved airflow-measurement methods and confirms the installed system is accessible and operational.
Envelope & insulation
Building enclosure and QII
Field verification for air leakage, insulation quality, and existing conditions at the required construction stage.
CF3R-ENV-20-H ↗Blower-door / building air leakage
Measures air leakage through building or dwelling-unit enclosures with calibrated blower-door equipment.
CF3R-ENV-21-H ↗QII air sealing — framing stage
Verifies air-infiltration sealing before insulation and assemblies conceal required inspection areas.
CF3R-ENV-22-H ↗QII insulation installation
Verifies insulation is installed without significant gaps, voids, compression, or misalignment.
CF3R-EXC-20-H ↗Existing conditions verification
Verifies applicable existing building features used for an alteration compliance approach.
Water heating
Verified distribution measures
CF3R-PLB-22-H ↗Hot-water distribution
Verifies eligible single-dwelling-unit hot-water distribution measures where specified by the compliance documents.
Documentation & project support
Keeping the compliance path organized
CHEERS registry support
Project review, applicable verification-document workflow, and coordination with the responsible parties.
CalCERTS-to-CHEERS assistance
Review of legacy records and available documents to determine the next registry and compliance steps.
Permit closeout review
Review of available permit and compliance information to identify field-verification work within our scope.
Contractor program support
Repeat scheduling, organized intake, field coordination, and consistent status communication for contractor partners.
Pre-cover coordination
Scheduling for QII, air sealing, ducts, and other measures that must be observed before construction covers the work.
Retesting
Focused retesting of measures after the responsible installer completes corrections.
Not every project requires every measure.
The registered compliance documents—not a generic website list—determine which verification forms and procedures apply to a particular project.
Measure names and form identifiers are based on the California Energy Commission’s 2025 Single-Family compliance-document library.
Send the project documents
We’ll confirm the applicable verification scope.
Include the address, permit number, scope, CF1R documents, installer information, and project stage.
Request an inspection