I need to calculate the RH% inside a house given the outside temp, outside RH%, and indoor temperature. This requires two steps. First calculate dew point of outside, then using same dew point and indoor temp, calculate indoor RH%. But this calculator erases the dew point when I’m at step 2 entering the indoor temp. I have to memorize the dew point and re-enter it. Another minor thing is it displays too many digits. P.S. The developer taught me a trick. At step 2 before entering the temp, press the dew point button first, then the dew point number will stay. I added one more star to the review.
Just to cross ck proper use: 1) Don’t I need return & supply WB to ascertain change in ethalpy? There is only 1 temp & 1 WB entry - so how are we calc enthalpy 2) For TTL btu change I’d need the enthalpy X ACFM. Where is the function to make this final reading?
---- 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.
