Know what’s in the number.
See the inputs, assumptions, and sources behind your estimate.
Understand what drives your building’s heating and cooling needs. Estimate peak loads, review the assumptions, and take a clear report into your next project discussion.
No account required US & metric units
See the inputs, assumptions, and sources behind your estimate.
Save in your browser. Export a project file to keep or share.
Review the load breakdown and print a report for your records.
Build a peak-load estimate from your building envelope, solar exposure, internal gains, ventilation, and infiltration.
Start a calculationEnter design conditions and building details.
Review heating, cooling, and the contributing factors.
Keep the project file and print your report.