Washington State University’s Energy Program has released a new residential energy code calculator, replacing an existing spreadsheet tool used by homebuilders to document energy code compliance efforts. 

The calculator, available on the WSU Energy Program website, streamlines energy code documentation for residential construction across Washington. 

“Our goal was to simplify residential energy code documentation,” said Jonathan Jones, energy program coordinator at the WSU Energy Program, in a statement. “By providing users with a web-based tool, we are making it faster and easier to submit permitting documents with bult-in features for guidance – similar to bowling bumpers – to keep users on track.” 

The updated tool builds upon the WSU Energy Program’s technical support resources, replacing spreadsheet workflows with a user-friendly digital platform.
Its new functions include:  

• Calculating window and door heat loss and overall building insulation performance. 
• Precise equipment sizing and check of mechanical system specifications. 
• Ability to save multiple project profiles and update compliance records. 
• Generating reports required by local offices for building permit applications.