Calculator of Air 4+

Easy! Easy! Very easy!
Very easy Humidity Charts calculator app!
This is a HVCA tool already used in more than 20 countries worldwide!

---- Very easy "Psychrometric Charts" calculator! ----
# Psychrometric Charts means Humidity Charts.

If you use this app, you can very easily calculate humidity, dew point temperature, etc.
The app supports 6 items, "dry bulb temperature", "wet bulb temperature", "dew point temperature", "relative humidity", "humidity ratio" and "enthalpy".
If you enter the any 2 of the items and tap “ENTER”, the app is automatically calculate other items.
You can refer to more items(plus 6 items) by use the app and sister app "HumidCalc" in combination(additional features since version 1.0.7).
For example, if you use this function, you can know specific-volume when you know dew point temperature and relative humidity.
Input range is the temperature is -273.15 ℃ to 99.97 ℃ (-459.67 ° F to 211.95 ° F), the humidity ratio is 0 kg/kg to 1 kg/kg (0 lb/lb to 1lb/lb) and the relative humidity is 0 %RH to100 %RH.
If you enter an abnormal number (for example, high wet-bulb temperature than the dry-bulb temperature), makes us known in the error display.
The app can be used in Celsius temperature (℃) or Fahrenheit temperature (° F) and Click-Sound also can be of choice turned ON / OFF.

※ 1: If you are using a 3.5 inches device, and if you want to change the setting of temperature unit or click sound, yu can change by the iOS device's Settings app.
※ 2: Atmospheric pressure is fixed at the standard atmospheric pressure (1013.25hPa / 29.92inHg).


- Disclaimer 1.
Please input and use the temperature range(0 ℃ to 40 ℃ / 32°F to 104°F ) according to common sense as much as possible. If you enter an extreme value correct calculation result may not appear.

- Disclaimer 2.
We are making as much as possible precise calculation result is output, but there are cases where errors due to technical problems, such as floating point results.

- Disclaimer 3.
We are not liable for any damage caused by the use of this application does not bear all of the responsibility.