You’ve chosen your HVAC system, scheduled installation, and you’re ready to enjoy better comfort—until your contractor says you can’t move forward without HERS testing. In California, HERS (Home Energy Rating System) testing is a legally required step for HVAC upgrades. While it’s critical for energy compliance and system performance, delays in scheduling or documentation can stall your project for days or even weeks.
This blog unpacks why HERS testing delays happen, how they impact your HVAC installation timeline, and—most importantly—what you can do to avoid unnecessary headaches.
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TLDR – Quick Guide
HERS testing can delay HVAC installations due to:
- Scheduling backlogs with certified raters
- Missing permits or jobsite access issues
- Incomplete or incorrect system documentation
To avoid delays:
- Work with a contractor who handles HERS coordination
- Schedule testing early in your project timeline
- Ensure documentation is accurate and complete
Detailed Breakdown: Understanding and Preventing HERS Testing Delays
1. What Is HERS Testing and Why It’s Required
HERS testing is mandated by the California Energy Commission to verify energy efficiency standards for HVAC systems. It ensures your new system is correctly installed, sealed, and operating within required performance benchmarks.
Typical tests include:
- Duct leakage testing
- Airflow verification
- Refrigerant charge evaluation
These assessments aren’t optional—they’re required before a project can close permits and officially wrap up. Brewer Heating & Air Conditioning incorporates these compliance steps as part of every installation to ensure your project runs smoothly and lawfully.
2. How HERS Delays Happen—and Why They Matter
Delays can occur when:
- The rater is backlogged with other jobs
- The jobsite isn’t ready when the rater arrives
- Documentation is missing or permits are incomplete
These issues can add anywhere from 2 to 10 extra days—or more—to your project timeline. That means prolonged discomfort, missed inspection windows, and delayed occupancy in some cases.
For residential projects, even a short delay in extreme weather can create serious comfort and health concerns. For commercial installs, it can disrupt business operations or tenant move-in schedules.
3. How Homeowners Can Proactively Prevent Delays
You don’t have to wait around for things to go wrong. Here’s how to keep your HVAC project on track:
- Choose a contractor who manages HERS scheduling for you. This eliminates finger-pointing and puts the responsibility where it belongs.
- Book HERS raters early. Don’t wait until the end of the install—get your slot reserved during the planning stage.
- Confirm jobsite readiness. The rater needs full access and a completed system ready for inspection.
- Ensure paperwork is accurate. Your contractor should submit proper CF1R and CF2R forms to the registry before testing begins.
At Brewer Heating & Air Conditioning, we coordinate all HERS documentation and testing as part of our design-build HVAC service, helping clients avoid red tape and delays.
4. The Financial and Comfort Costs of Delay
Every day your project stalls is a day of missed energy savings and reduced comfort. In peak seasons, even short delays can lead to emergency rental costs, extra utility bills from inefficient temporary solutions, or rescheduling fees with city inspectors.
HERS testing is essential—but it shouldn’t derail your project. When integrated properly into your project’s workflow, it becomes a checkpoint, not a roadblock.
Key Takeaways
- HERS testing is required by law in California for HVAC system compliance and energy efficiency validation.
- Delays happen due to poor planning, rater scheduling, and permit/documentation issues.
- Homeowners can minimize delays by working with contractors who manage the entire HERS process.
- Early scheduling, jobsite readiness, and proper paperwork are essential for passing testing quickly.
- Partnering with a full-service HVAC provider like Brewer Heating & Air Conditioning ensures compliance and project efficiency.
FAQs
What is HERS testing and who performs it?
HERS testing stands for Home Energy Rating System testing and is performed by a certified third-party rater. It validates that your HVAC installation meets California’s energy efficiency and airflow standards. Contractors are not allowed to perform their own HERS tests.
How long does HERS testing take?
Most HERS inspections take 1–2 hours, but scheduling can delay the process. Testing must be done after the system is installed and before final permit sign-off. That’s why early coordination is essential to avoid bottlenecks.
Is HERS testing required for all HVAC projects?
In California, most HVAC change-outs and new installations require HERS testing to comply with Title 24 energy codes. Exceptions are rare and usually only apply to very minor system modifications. Always confirm requirements with your HVAC contractor or local building authority.
Can I choose my own HERS rater?
Technically yes, but it’s more efficient to let your HVAC contractor coordinate this for you. They usually have trusted partners who understand your system and paperwork. Coordinating independently can lead to communication gaps and project delays.
What happens if my HVAC system fails HERS testing?
If your system fails, corrections must be made before the rater can issue compliance documents. This might involve fixing duct leaks, adjusting refrigerant levels, or rebalancing airflow. A retest will be needed, which can further delay your project.