California's Title 24 Building Energy Efficiency Standards affect most HVAC installations. Here's what homeowners need to know.
What is Title 24?
Title 24 is California's building energy code. It sets minimum efficiency requirements for: - New construction - Additions - HVAC replacements - Major renovations
When Does Title 24 Apply?
Definitely Applies - New HVAC system installation - Replacement of existing system - Adding AC where none existed - System changes during remodel
May Not Apply - Like-for-like component repairs - Simple maintenance - Thermostat replacement only
Key Requirements
Equipment Efficiency - Minimum SEER ratings - Minimum AFUE for furnaces - Must meet or exceed standards
Duct Requirements - Duct leakage testing - Proper insulation - Sealing requirements - May require duct replacement
Other Elements - Proper refrigerant charge verification - Airflow verification - Quality installation verification
The HERS Rater
HERS (Home Energy Rating System) raters: - Verify compliance - Perform duct testing - Document for permits - Required for most projects
Cost: $150-$400 typically (often included by contractor)
Permit Requirements
When Needed - Almost all HVAC installations - System replacements - Adding new zones
The Process 1. Contractor pulls permit 2. Installation completed 3. HERS testing performed 4. City inspection 5. Permit closed
Common Compliance Issues
Duct Leakage - Older ducts often fail testing - May require sealing or replacement - Adds to project cost
Proper Sizing - Systems must be correctly sized - Manual J calculation required - No more "bigger is better"
Cost Impact
Title 24 compliance adds: - Testing costs: $150-$400 - Permit fees: $100-$500 - Duct repairs: $500-$2,000+ if needed - May require equipment upgrades
Benefits of Compliance
- Lower energy bills (guaranteed)
- Better comfort
- Proper installation
- Documentation for resale
- No permit issues later
Working with Your Contractor
They Should - Explain Title 24 requirements - Include compliance in quote - Handle permits - Coordinate HERS testing
Red Flags - "We don't pull permits" - No mention of Title 24 - Significantly lower price than competitors
Bay Area Specifics
Climate Zones Bay Area includes multiple climate zones affecting requirements: - Coastal areas: Zone 3 - Inland areas: Zone 4 - Requirements vary slightly
Local Jurisdictions Some cities have additional requirements beyond Title 24.
Bottom Line
Title 24 compliance adds cost but ensures: - Properly installed system - Verified performance - Energy savings - Legal installation
Don't skip permits to save money—the risks far outweigh the savings.