HVAC Superheat Subcooling Calc

R-454B Refrigerant PT Chart

$4.99 · Designed for iPad. Not verified for macOS.

R-410A liquid line 95F at 340 psi - subcool low or charge right? Superheat and subcool from built-in PT charts for R-410A, R-22, R-134a, R-404A. $4.99 one-time, no login. On a service call and need to check superheat and subcooling without flipping through PT charts? Select your refrigerant (R-410A, R-22, R-134a, or R-404A), enter suction and liquid line pressures and temperatures, and get instant color-coded readings: green for normal, yellow for marginal, red for out of range. WHAT IT CALCULATES: - Superheat (suction line temperature minus saturation temperature) - Subcooling (saturation temperature minus liquid line temperature) - Saturation temperatures from built-in pressure-temperature charts REFRIGERANTS SUPPORTED: - R-410A - R-22 - R-134a - R-404A KEY FEATURES: - Built-in PT charts for all four refrigerants - Color-coded status indicators for quick diagnosis - Target range reference (10-15 F for both superheat and subcooling) - Instant results as you adjust inputs - Works completely offline - No account or login required Built for HVAC technicians, refrigeration mechanics, and service professionals who need fast, reliable superheat and subcooling checks during system diagnostics and charging.

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Added R-32 and R-454B (A2L) with correct bubble/dew superheat & subcooling, plus higher-accuracy PT curves.

Version 1.0.3

The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    • 1.1 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Sheyuan Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by Shanghai Sheyuan Network Technology Co., Ltd.

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