AirCalc Psychrometric
HVAC Calculator for Engineers
Only for iPhone
$1.99 · Designed for iPhone. Not verified for macOS.
iPhone
Now with HVAC engineering tools: load calculator, mixed air blending, coil analysis with SHR, save & compare states, and PDF export. 8 languages. Fully offline.
AirCalc Pro is a professional-grade psychrometric calculator and HVAC engineering toolkit designed for HVAC engineers, mechanical engineers, and building science professionals.
Enter any two air properties and instantly compute all eight psychrometric parameters — no internet connection required.
CORE FEATURES
• Psychrometric Calculator
Select any 2 of 8 parameters as inputs: Dry Bulb Temperature, Relative Humidity, Absolute Humidity,
Humidity Ratio, Dew Point, Wet Bulb Temperature, Enthalpy, and Specific Volume. The app instantly
calculates all remaining values.
• Interactive Psychrometric Chart
Visualize air states on a real-time psychrometric diagram. Tap or drag the state point to explore
different conditions. The chart displays relative humidity curves (10%–100%), constant enthalpy lines,
saved state points, and coil process lines with SHR direction.
• 27 Input Combinations
Supports 27 valid input pair combinations with robust solvers including direct computation and
Newton-Raphson iteration for complex pairs.
ENGINEERING TOOLS
• Load Calculator
Enter airflow rate (CFM or m³/h) with supply and return air states to calculate total, sensible, and
latent cooling/heating loads, moisture removal rate, and condensate rate.
• Mixed Air Calculator
Blend outdoor air and return air by percentage to calculate the mixed air state. Useful for AHU,
economizer, and ventilation analysis.
• Coil Process Analyzer
Analyze entering and leaving air conditions across a coil. Calculates Sensible Heat Ratio (SHR),
total/sensible/latent capacity, dehumidification status, and condensate rate.
• Save & Compare States
Save air states with custom labels. Compare any two saved states side-by-side with color-coded deltas for
all parameters. Saved states also appear as numbered points on the psychrometric chart.
• PDF Export
Generate and share professional psychrometric reports as PDF directly from the app.
SETTINGS & LOCALIZATION
• Unit Conversion: switch between °C/°F and kPa/atm
• 8 Languages: English, Japanese (日本語), Chinese (中文), Korean (한국어), Thai (ไทย), Vietnamese (Tiếng
Việt), German (Deutsch), and Spanish (Español)
• Auto-detects device language on first launch
TECHNICAL DETAILS
• Based on standard psychrometric equations (Magnus formula, ASHRAE reference methods)
• Dry bulb temperature range: -20°C to 90°C
• Standard atmospheric pressure: 101.325 kPa (adjustable)
• All calculations performed locally — fully offline
• Results in under 10 milliseconds
DESIGNED FOR
• HVAC system design and commissioning
• Indoor air quality analysis
• Building energy audits
• Mechanical engineering coursework
• Clean room and data center climate control
• Agricultural and food processing environments
AirCalc Pro delivers the accuracy of psychrometric reference tables with the convenience of a modern
mobile interface. One purchase, no subscriptions, no ads, no data collection.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug fixes and performance improvements.
The developer, Duong Nguyen Huu, 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
- Duong Nguyen Huu
- Size
- 26.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 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 Gnouden
