Flux HVAC: Tech Calculator

The essential toolkit for HVAC pros. Calculate Superheat, Subcooling, Duct Sizing, Airflow & System Capacity instantly. Works 100% Offline.

STOP GUESSING. START MEASURING.

Flux HVAC is the modern, professional toolkit designed for the 2025 technician. We combined the essential tools into one lightning-fast app, helping you diagnose issues faster, charge systems accurately, and validate your work with confidence.

Whether you are on a scorching roof or in a crawl space with no signal, Flux HVAC works 100% offline.

KEY FEATURES:

1. PRECISION CHARGING

• Superheat Calculator: Accurate targets for non-TXV (fixed orifice/piston) systems.
• Subcooling Calculator: Precise liquid line verification for TXV systems.
• Visual Indicators: Clear color-coded sliders tell you exactly when your charge is optimized.
• Includes pre-loaded data for standard refrigerants (R-410A, R-22, etc.).

1. VISUAL DUCTULATOR (Duct Sizing)

• Forget the cardboard wheel. Calculate round and rectangular duct sizes in seconds.
• Interactive Visualizer: See the duct shape change as you adjust dimensions.
• Velocity Alerts: Automatic warnings for high FPM to prevent noisy systems.

1. SYSTEM PERFORMANCE (Capacity Check)

• Prove you fixed it. Enter Return and Supply air temps to calculate actual BTUs and Tons.
• Verify Delta T, Enthalpy change, and Sensible vs. Latent cooling capacity.
• The ultimate tool for "Verify & Bill."

1. PSYCHROMETRICS

• Instantly calculate Relative Humidity (RH%), Dew Point, and Enthalpy.
• Quickly diagnose humidity issues based on dry bulb and wet bulb readings.

1. CAPACITOR TEST (Under Load)

• Test capacitors without disconnecting wires.
• Input Volts and Amps to identify weak or failed capacitors before they damage the compressor.

WHY CHOOSE FLUX HVAC?

• Built for Speed: Large sliders and buttons designed for gloved hands.
• Offline First: No internet required for calculations.
• Visual Feedback: High-contrast interface designed for outdoor visibility.

Download Flux HVAC today and carry a master technician's toolkit in your pocket.