Flue Gas Combustion Calc

Excess Air & Efficiency Tool

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

Also Included In

FlueGas Calc - professional calculator. Tuning a boiler or furnace and need to verify combustion efficiency on the spot? Enter fuel type, flue oxygen percentage, flue temperature, ambient temperature, and CO level in ppm. Get instant readings for excess air percentage, combustion efficiency, stack loss, and CO safety status with color-coded alerts. Supports Natural Gas, Propane, Oil, and Coal fuel types. WHAT IT CALCULATES: - Excess air percentage from flue O2 reading - Net stack temperature (flue minus ambient) - Stack loss percentage - Combustion efficiency percentage - CO safety status: Good (green), Marginal (yellow), Dangerous (red) KEY FEATURES: - Four fuel types built in - Color-coded CO safety alert - Instant results as you adjust inputs - Clean, field-friendly interface - Works completely offline - No account or login required Built for boiler technicians, HVAC service professionals, and combustion engineers who need quick efficiency checks during tuning and commissioning.

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Added a More Pro Tools section to discover related field calculators.

Version 1.0.2

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
    850.9 KB
    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.

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