California guidance states that HVAC replacement or alteration requires permits through the local building department. Project details and local jurisdiction procedures still need to be confirmed.
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Clear filtersCalifornia's Home Energy Rating System uses independent raters for required field verification and diagnostic testing on certain energy-code measures, including many HVAC alterations.
A certified HERS/ECC rater performs required independent verification. Homeowners may ask to see completed forms and may choose a rater independently, subject to program rules.
California's 2025 single-family HVAC guidance says replacing either the indoor or outdoor unit of a split system can trigger duct sealing and field-verification requirements, subject to stated exceptions.
California alteration rules can trigger duct sealing and testing when a space-conditioning system is altered. The applicable code edition, exceptions and local permit must be checked for the project.
CF3R forms document installation and field-verification compliance for applicable California energy-code measures. The exact forms required depend on the project scope.
A final inspection helps verify that permitted work meets applicable building and energy-code requirements. Utility rebates may also require proof of permit or verification.
California Energy Commission guidance says homeowners have the right to find and hire a rater independently, even though contractors often work with established raters.
California's C-20 classification covers warm-air heating, ventilation and air-conditioning systems and related ducts, controls and filters as defined by CSLB.
Use CSLB's official license-check service to verify current license status and classifications before hiring a contractor.
A heat-pump installation may require electrical work such as circuits or panel changes. Scope and licensing requirements depend on the work; specialized electrical upgrades may require the appropriate electrical trade.
Permits and required inspections are part of code-compliant installation. They document the work and allow the authority having jurisdiction to inspect applicable safety and energy requirements.
If HERS verification is required by the applicable California Energy Code, it is part of code compliance rather than an optional upgrade. The project should follow current permit requirements.
California code provides leakage criteria and, in some circumstances, alternative verification pathways when existing ducts cannot meet the standard target. The rater and contractor should follow the current code procedure.
Some utility HVAC rebate programs require permits, qualifying equipment and HERS/field verification. Current program rules must be checked before promising eligibility or amounts.
Official information behind our guidance
Equipment condition still requires professional evaluation. For regulations, rebates and efficiency guidance, Heco checks authoritative sources and identifies items that can change.
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