HVAC Superheat Calculator
Subcooling & R-454B PT Chart
$4.99 · Designed for iPad. Not verified for macOS.
Also Included In
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, R-404A, R-32, or R-454B), 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 data
REFRIGERANTS SUPPORTED:
- R-410A
- R-22
- R-134a
- R-404A
- R-32
- R-454B
KEY FEATURES:
- Built-in saturation pressure-temperature data for all six 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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Updated app name and metadata.
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.
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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sheyuan Inc.
