From the first reading to the finished service report, CoolCalc keeps your HVAC workflow moving. Check PT and charge values, size ducts, explore airflow and diagnostic tools, and turn job notes into a clear PDF. This update makes PT Chart, Charge Check, and Duct Sizer easier to start with example inputs, clearer required fields, and better input feedback. It also refines the Pro upgrade experience and purchase details.

More field calculations. A faster path from readings to a finished report. • New Psychrometric Quick Calc for humidity, dew point, wet bulb, enthalpy, and more • Duct Sizer 2.0 for round, rectangular, and flex duct sizing, airflow, and friction checks • Electrical Diagnostics for Ohm’s law, power, voltage drop, and phase imbalance • Gas Heating Quick Checks for temperature rise and gas meter clocking • Recovery Cylinder Fill checks with gross-weight and water-capacity modes • Save calculation results to a job, then continue with photos, signatures, and PDF reports • Explore the complete workflow with a read-only sample job and quickly return to recent work • Smoother onboarding, clearer purchase states, and improved startup reliability Core calculations remain free and unlimited. Pro unlocks more job documentation, PDF exports, photos, and the full reference library.

Built for the work between arrival and sign-off. • Faster HVAC calculations with a field-ready custom keypad and smoother input flow • Charge Check now includes Target Superheat estimation and neutral condition guidance • Add measurements, photos, captions, notes, and customer signatures to a job • Generate cleaner PDF service reports and share them from the field • Expanded offline PT reference data with visible source, version, and estimate status • New Capacitor Test, Refrigerant Log, and System Check tools • Available in 15 languages with refreshed dark mode support Core calculations remain free and unlimited. Pro unlocks more job documentation, PDF exports, photos, and the full reference library.

This update makes CoolCalc a complete field toolkit: • 3 new calculators — Capacitor Test, Refrigerant Log, and System Quick Score • Target Superheat estimation added to Charge Check for fixed-orifice systems • A2L refrigerant support with safety-class flags for the 2025 transition • Faster, cleaner reports and refreshed dark-mode UI • Now available in 15 languages Everything still runs 100% offline. No account, no cloud. Thanks for the feedback — keep it coming.