California Title 24
Energy Code Compliance Testing
Field verification and compliance testing for residential and low-rise multi-family projects throughout Northern California.
Credentials & Certifications
Certified & Trained
Recognized training and certification supporting residential energy-code verification and HVAC compliance field services.
CEC Title 24 Trained
Training aligned with California Title 24 residential energy-code compliance requirements.
CHEERS Certified
Registered with CHEERS for California energy-compliance reporting and verification workflows.
EPA Section 608 Universal
Universal refrigerant-handling certification supporting HVAC testing and service-related compliance work.
Energy Skilled
Recognized by the U.S. Department of Energy for Single Family Home Energy Audit services.
ECC Field Verification
Services Available
Select a service to see how the appointment works and what should be ready before we arrive.
Service Guide
Duct Leakage Testing
What to expect from start to finish — most visits are completed in a single appointment.
How Duct Testing Works
Registers sealed
Every supply register and return grille is sealed with reusable register seals, leaving one opening for the calibrated fan.
System pressurized
A calibrated duct pressurization fan pushes air into the ductwork to a standard test pressure of 25 Pascals.
Leakage measured
A digital manometer measures the airflow required to hold pressure — that number is your total duct leakage.
Pass/fail on the spot
We compare measured leakage against the applicable Title 24 allowance for your project and tell you the result immediately.
Documentation registered
Passing results are documented on the applicable registered compliance forms and delivered for permit sign-off.
Service Guide
Quality Insulation Installation (QII)
What to expect from start to finish — schedule this inspection before concealed assemblies are covered.
How QII Works
Energy report review
We review the Title 24 energy report to confirm the specified R-values and insulation types for the applicable assemblies.
Room-by-room walkthrough
Insulated walls, ceilings, floors, and attic surfaces are visually inspected using the applicable verification method for the installed insulation type.
Detail verification
Air-barrier continuity, top-plate sealing, penetrations, and other required installation details are checked against the applicable protocols.
Corrections if needed
Deficiencies are identified clearly so they can be corrected before the assembly is concealed; re-verification may be required depending on the correction.
Certification & sign-off
Passing results are documented on the applicable registered compliance forms so construction can proceed toward permit sign-off.
Service Guide
Refrigerant Charge Verification
What to expect from start to finish — test conditions must be within the applicable protocol range.
How Refrigerant Charge Testing Works
System run-up
The AC or heat pump operates at the required capacity long enough to stabilize operating conditions.
Measurements taken
Calibrated instruments record the required refrigerant-line, air-temperature, and pressure measurements.
Charge evaluated
Measured values are compared with the applicable manufacturer and Title 24 verification criteria.
Pass/fail result
You receive the result immediately, along with useful correction information for the HVAC contractor if the charge is outside the allowable range.
Documentation registered
Passing results are documented on the applicable registered compliance forms for permit sign-off.
Service Guide
Airflow Testing
What to expect from start to finish — most visits are completed in a single appointment.
How Airflow Testing Works
System configured
A clean filter is installed, registers are opened, and the system is configured for the required operating condition.
Airflow measured
Calibrated measurement equipment is used to determine actual delivered system airflow.
Required airflow compared
Measured airflow is compared against the requirement shown by the applicable energy documentation and verification protocol.
Diagnostics if low
When airflow is low, pressure and system observations can help identify likely restrictions such as filters, coils, returns, or ductwork.
Documentation registered
Passing results are documented on the applicable registered compliance forms for permit sign-off.
Service Guide
Blower Door Testing
What to expect from start to finish — most visits are completed in a single appointment.
How Blower Door Testing Works
Building prepared
Exterior doors and windows are closed, interior doors opened, and intentional openings are sealed or configured according to the test protocol.
Blower door installed
A calibrated fan and frame assembly is fitted into an exterior doorway with an airtight panel.
Building depressurized
The fan pulls air from the building to establish the required 50 Pascal pressure difference from outdoors.
Leakage measured
A digital manometer records the airflow needed to hold pressure, reported as CFM50 and air changes per hour (ACH50).
Results & documentation
You receive the result immediately, with applicable registered compliance forms delivered for permit sign-off.
Service Guide
Leakage to Outside (LTO)
Unlike total duct leakage, LTO isolates the portion of leakage that escapes outside the conditioned building envelope.
How Leakage to Outside Testing Works
Duct system prepared
Supply registers and return grilles are sealed as required, and the duct system is connected to calibrated pressurization equipment.
Building pressure controlled
A blower-door assembly is used to establish the required pressure relationship between the conditioned space and outdoors.
Ducts pressurized
The duct system is brought to the prescribed 25 Pascal test pressure while the conditioned space is also maintained at the required pressure relative to outdoors.
Outside leakage measured
The airflow needed to maintain the duct pressure under these conditions represents leakage that communicates with outdoors or unconditioned space outside the tested envelope.
Result & documentation
The measured LTO is compared with the requirement applicable to the project, and passing results are documented on the applicable registered compliance forms.
Service Guide
Fan Efficacy & Watt Draw
What to expect from start to finish — airflow and blower power are evaluated together.
How Fan Efficacy & Watt Draw Testing Works
System at required airflow
The blower operates at the applicable design or verification airflow with a clean filter installed.
Watt draw measured
A calibrated power meter records the blower motor's electrical input.
Airflow measured
System airflow is measured using the applicable approved measurement method.
Efficacy calculated
Measured watts and airflow are used to determine fan efficacy and compare it with the applicable project requirement.
Documentation registered
Passing results are documented on the applicable registered compliance forms for permit sign-off.
Northern California Service Area
Cities & Communities We Serve
Norcal ECC serves projects throughout 12 Northern California counties. Choose a county to view the cities and Census-designated communities in our service area.
Butte County
30 locationsSelect a community to open it in Google Maps.
Tehama County
18 locationsSelect a community to open it in Google Maps.
Glenn County
5 locationsSelect a community to open it in Google Maps.
Plumas County
45 locationsSelect a community to open it in Google Maps.
Colusa County
9 locationsSelect a community to open it in Google Maps.
Sierra County
14 locationsSelect a community to open it in Google Maps.
Yuba County
11 locationsSelect a community to open it in Google Maps.
Sutter County
9 locationsSelect a community to open it in Google Maps.
Yolo County
17 locationsSelect a community to open it in Google Maps.
Nevada County
14 locationsSelect a community to open it in Google Maps.
Placer County
23 locationsSelect a community to open it in Google Maps.
Sacramento County
35 locationsSelect a community to open it in Google Maps.