California HVAC Load Calculation Guide
Free HVAC load calculation guide for California. Review climate zones, design temperatures, building code context, and local calculator resources for Los Angeles, San Diego, San Joseand 3 more cities.
Start with the Free California Load Calculator
Use our residential or commercial calculator to estimate loads with California-relevant climate conditions in mind.
California Design Temperatures
Winter Design Temperature
30°F
Used for heating load calculations and equipment sizing across California
Summer Design Temperature
102°F
Used for cooling load calculations and equipment sizing across California
California Building Codes & Requirements
HVAC Requirements
- • HERS verification required
- • High-efficiency equipment mandatory
- • Demand response capability
Note: Most stringent energy codes in the US with frequent updates
Energy Code
Title 24 (most stringent in nation)
Common Building Types
- • Stucco/frame homes
- • Multi-family housing
- • Commercial high-rise
California HVAC Challenges
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Seismic requirements
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Wildfire concerns
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Diverse climate zones
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Strict efficiency standards