Texas HVAC Load Calculation Guide
Free HVAC load calculation guide for Texas. Review climate zones, design temperatures, building code context, and local calculator resources for Houston, San Antonio, Dallasand 3 more cities.
Start with the Free Texas Load Calculator
Use our residential or commercial calculator to estimate loads with Texas-relevant climate conditions in mind.
Texas Design Temperatures
Winter Design Temperature
20°F
Used for heating load calculations and equipment sizing across Texas
Summer Design Temperature
101°F
Used for cooling load calculations and equipment sizing across Texas
Texas Building Codes & Requirements
HVAC Requirements
- • High SEER minimums
- • Duct testing mandatory
- • Enhanced humidity control
Note: Houston area requires special humidity control; West Texas has different dry climate considerations
Energy Code
2015 IECC with Texas amendments
Common Building Types
- • Ranch-style homes
- • High-rise buildings
- • Industrial facilities
Texas HVAC Challenges
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Extreme heat
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High humidity (east)
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Drought conditions
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Severe weather
Local Resources
Texas Department of Licensing
government