HERS Triggers for HVAC Replacement Permits in California

HVAC replacement permits often look simple until the project team discovers that the permit also carries HERS verification requirements. The trigger is not just whether equipment is new; it is how the replacement affects the energy compliance documents, duct system, refrigerant charge, airflow, and local permit review.

This article is a field-oriented starting point, not a substitute for project-specific code review. Use it to organize the permit package and inspection handoff before the installer is waiting for closeout.

Common HERS trigger areas

For residential HVAC work, HERS requirements commonly appear around duct leakage, airflow, fan efficacy, refrigerant charge, and equipment installation details. The exact measures depend on the project scope, system type, climate zone, and the forms generated for the permit.

If the permit includes both energy documentation and field verification, Strata’s HVAC permit and HERS bundle is the relevant service path. For testing-only support, start with HERS testing.

Questions to answer before filing

Before the permit application goes in, confirm:

• Is this a like-for-like replacement, a system changeout, or part of a larger alteration?
• Are ducts being replaced, extended, relocated, or left in place?
• Is the air handler located in conditioned or unconditioned space?
• What equipment model numbers and efficiencies will be installed?
• Who will schedule HERS verification after installation?

These answers should match the Title 24 forms and the contractor’s scope. A mismatch can create plan check comments or a failed closeout inspection.

Do not wait until final inspection

The most common coordination problem is waiting until the end of the job to ask whether HERS applies. By then, access may be limited, equipment labels may be hard to document, and the installer may have moved on to another project.

For location-specific coordination, see HERS coordination in Sacramento, HERS coordination in Seattle, and HERS coordination in Brentwood.

What to send the HERS provider

A practical handoff includes the approved energy forms, permit number if available, equipment data, site contact, installer contact, and photos or notes that explain duct access. If the Title 24 documentation changed during plan check, send the approved version rather than an early draft.

When to ask for help

Ask for help before filing when the contractor is unsure whether HERS applies, when ducts are involved, or when the project combines HVAC replacement with other alteration work. Send the scope through contact with the city, equipment type, duct work description, and target inspection date.