ACADEMY SERIES · EPISODE 8Psychrometrics & Sizing
How to Read a Psychrometric Chart
Heating, humidification, mixing and cooling each become an arrow on the psychrometric chart. From a single point at 22 °C and 50% relative humidity, you can read the humidity ratio, the dew point and the enthalpy. This episode covers the chart's axes and curves, how steam and adiabatic humidification differ on it, mixing and the summer cycle, and how capacity is calculated straight from the chart.
Published: 8 October 2026Narration: Turkish and English6:43
In this video
- On the psychrometric chart, the horizontal axis is dry-bulb temperature and the vertical axis is the humidity ratio (grams of vapour per kilogram of dry air); the 100% RH curve marks the most vapour the air can hold.
- From a single point at 22 °C and 50% RH you can read a humidity ratio of about 8.2 g/kg, a dew point of about 11 °C and an enthalpy of about 43 kJ/kg.
- Resistive steam humidification draws an almost vertical arrow; in adiabatic humidification the point slides up and to the left along constant enthalpy, and each gram of water added cools the air by about 2.5 °C.
- Capacity comes from the humidity-ratio difference, not the RH difference: raising 10,000 m³/h from 30% to 50% at 22 °C takes about 40 kg of steam per hour, and a 20% service margin leads to a unit in the 50 kg/h class.
- Duct air is kept clear of saturation; a high-limit humidistat caps supply humidity at 85–90% RH.
More from this series
Academy Series · Ep. 1
Moisture Load Calculation
Psychrometrics & Sizing · 4 October 2026
Academy Series · Ep. 2
Relative Humidity and Health
Health & Indoor Climate · 3 October 2026
Academy Series · Ep. 3
Dehumidification Technologies
Technology Selection · 4 October 2026
Academy Series · Ep. 4
Dehumidifier Selection
Equipment Selection · 4 October 2026
Academy Series · Ep. 5
How to Calculate Humidification Load
Humidification Load · 5 October 2026
Academy Series · Ep. 6
Humidity Control in Swimming Pools
Pool Humidity Control · 5 October 2026
More videos
Service & Maintenance
Neptronic SKE4 — External Analog Control Profile
Settings & Commissioning · 4 October 2026
Products & Technology
Neptronic × NKT: Turkey Distribution Agreement
Humidification · Neptronic · 1 October 2026
Service & Maintenance
Neptronic SKE4 — How to Use the Control Panel
Settings & Commissioning · 27 August 2026








