Washington HVAC Load Calculation Guide
Free HVAC load calculation guide for Washington. Review climate zones, design temperatures, building code context, and local calculator resources for Seattle, Spokane, Tacomaand 3 more cities.
Start with the Free Washington Load Calculator
Use our residential or commercial calculator to estimate loads with Washington-relevant climate conditions in mind.
Washington Design Temperatures
Winter Design Temperature
1°F
Used for heating load calculations and equipment sizing across Washington
Summer Design Temperature
89°F
Used for cooling load calculations and equipment sizing across Washington
Washington Building Codes & Requirements
HVAC Requirements
- • Very high efficiency standards
- • Duct testing mandatory
- • Advanced ventilation
Note: One of the most stringent energy codes in the nation
Energy Code
2018 Washington State Energy Code
Common Building Types
- • Traditional homes
- • Green buildings
- • High-tech facilities
Washington HVAC Challenges
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Marine climate
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Seismic requirements
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Green building standards
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Energy codes
Major Cities in Washington
Local Resources
Washington State Department of Commerce
government
Washington HVAC Association
organization