The all-in-one field calculator for HVAC technicians
13 refrigerants including R-454B, R-32, R-410A. Drag the slider for instant bubble/dew pressures with GWP & ODP data.
Verify refrigerant charge with clear status indicators and diagnostic guidance. Field-ready in seconds.
Round and rectangular ducts via equal-friction method. Velocity check for main vs. branch lines.
Simplified cooling load using Manual J methodology. BTU/h, tons, and recommended unit size.
Dew point, wet bulb, enthalpy, humidity ratio from dry-bulb temp and RH. Mini psychrometric chart included.
°F/°C/K, PSIG/kPa/bar/MPa, CFM/m³·h/L/s, BTU/kW/tons/hp — instant, with formulas shown.