HVAC System Design & Load Calculations

Professional tools for accurate HVAC sizing and system planning

CoolCalc HVAC Design Tool

As an official CoolCalc partner, Atix HVAC gives contractors direct access to advanced HVAC design tools. Perform accurate Manual J load calculations, select properly sized equipment, and design efficient duct systems — all in one place.

This integrated solution helps you plan projects faster, reduce errors, and ensure every installation meets modern performance standards.

✔ Manual J Load Calculations
✔ Equipment Selection
✔ Duct Design Planning
✔ Contractor-ready reports