Getting Ready for ECC Verification: A Practical Guide for Sacramento Homes

Passing a verification test on the first visit is rarely about luck. It comes down to preparation. Sacramento homeowners and builders often focus on permits and schedules, then find out on test day that a duct connection is loose or the system is not ready to run. Each surprise can mean a second appointment, a delayed inspection and extra frustration.

This guide explains what to do before an Energy Code Compliance (ECC) rater arrives, which tests appear most often and how to avoid the mistakes that lead to failed results. Whether you are installing a new HVAC system, building an accessory dwelling unit or finishing a remodel, a little readiness saves a lot of trouble.

What the ECC Program Actually Does

Since January 1, 2026, California has handled field verification and diagnostic testing through the Energy Code Compliance Program under the 2025 Energy Code. HERS providers are now recognized as ECC providers, and HERS raters are recognized as ECC raters. Picture the rater as an independent referee. The contractor installs the equipment, and the rater confirms it performs the way the paperwork promised.

The tests a project needs are listed on its certificate of compliance. The installing contractor and the rater carry out those tests together, and the results go into an ECC provider’s registry. One ECC training resource also notes that group sampling for alterations has been removed and that refrigerant charge verification methods have been revised, so contractors should not assume last year’s routine still applies.

The Tests You Are Most Likely to Face

Every project is different, but a few tests show up again and again.

Duct Leakage Testing

Ducts work like the hidden highways of a home. During this test, the rater pressurizes the system and measures how much air escapes. ENERGY STAR reports that in a typical house, about 20 to 30 percent of the air moving through ducts is lost to leaks, holes and poor connections. One California rater company estimates that this test alone can take about one to two hours.

Airflow and Refrigerant Charge

Airflow checks confirm that enough air moves across the system’s coil for it to work properly. Refrigerant charge verification confirms the air conditioner or heat pump holds the right amount of refrigerant. According to one ECC resource, a fault indicator display alone may no longer be enough to demonstrate compliance, so ask your HVAC contractor which verification method will be used.

Other Project Specific Measures

Depending on the scope of work, other items such as thermostats, ventilation and additional HVAC features may also appear on the compliance documents. Always confirm the full list before scheduling.

A Pre-Test Checklist for Test Day

Use this list a few days before the appointment.

• Gather the certificate of compliance and list every required test.
• Confirm the HVAC system is fully installed, powered and able to run.
• Seal duct connections with mastic or metal tape. ENERGY STAR advises against standard duct tape because it does not last.
• Check the joints where ducts meet registers, floors, walls and ceilings, since these are common leak points.
• Clear access to the attic, crawlspace, electrical panel and outdoor unit.
• Make sure the installing contractor will be on site, since the contractor and rater work together.
• Keep plans, equipment specifications and permit paperwork within reach.

Every item above helps the visit go toward testing rather than waiting around.

Common Reasons Tests Fail

Picture a duct system as a bucket with small holes. The fuller you fill it, the more you lose. Typical trouble spots include:

• Disconnected, crushed or poorly supported duct sections
• Unsealed boots and register connections
• Refrigerant charge outside the accepted range
• Low airflow from blocked filters, undersized ducts or restricted returns
• Work that was not finished before the rater arrived

Most of these problems are easy to catch with a walkthrough before the appointment. A contractor who checks their own work first can save everyone a return trip.

Why Tight Ducts Matter Beyond Compliance

Passing a test is only part of the payoff. ENERGY STAR notes that sealed and insulated ducts can ease uneven room temperatures and can reduce the amount of dust and household chemical fumes drawn into the system. It also warns that leaky ducts can contribute to backdrafting, where combustion gases from gas appliances are pulled back into living areas instead of leaving through vents. In a Sacramento summer, when air conditioners work long hours, a well sealed system helps more of the cooled air reach the rooms where you actually live.

Timing Verification With Your Construction Schedule

Verification works best when it is planned like any other trade visit. Ducts are easiest to test and repair before insulation and finish work hide them, so talk to your contractor about scheduling around those milestones. Book the rater once the system is actually complete and running, not when the crew expects to finish. If several trades share the site, share the appointment date with all of them so nobody blocks attic access or shuts off power during the visit. A short call the day before to confirm everyone is on track can prevent a wasted trip.

Sacramento Incentives Tied to Good Testing

Passing verification can also support your savings. SMUD offers up to $3,000 in rebates for qualifying heat pump heating and cooling systems installed by a qualifying contractor. Its guidance references passing Title 24 through HERS documentation and calls for any new ductwork to be insulated to at least R8. SMUD also offers seal and insulate rebates for air sealing, attic insulation and new ductwork through participating contractors. It notes that leaky ducts in attics and crawlspaces can account for 20 percent or more of a home’s energy losses.

Rebate availability and rules change, so confirm current details with SMUD and your contractor before you commit to a project.

Questions to Ask Before You Schedule

A few questions up front keep the process smooth:

• Which tests are listed on the certificate of compliance?
• Who is responsible for having the system ready on test day?
• Which method will be used for refrigerant charge verification?
• How will results be registered and shared with me?
• What is the plan if a test does not pass?

What to Do If a Test Fails

A failed result is not the end of the road. When a test does not meet the compliance threshold, the contractor must correct the system until it passes. Ask the contractor to explain exactly what failed, what was changed and when the rater can return. Keep written notes and copies of updated documents, since passing results are recorded in the provider’s registry.

Final Thoughts

Verification does not have to feel like a surprise exam. When you know which tests apply, prepare the ducts and equipment, and keep everyone on the same schedule, the visit becomes a simple confirmation that the work was done right. California’s shift to the ECC Program changed the name and some procedures, but the goal remains the same: making sure efficiency measures work in the real world. Start early, communicate clearly and treat the rater as a partner in delivering a comfortable, efficient Sacramento home. Small steps taken before the appointment are what turn a stressful test day into a routine one, and they protect both your schedule and your budget.