Thermal comfort — is a state of satisfaction with the surrounding temperature, when a person feels neither too hot nor too cold. It is a subjective sensation that depends on many factors, including air temperature, humidity, air velocity, thermal radiation from surrounding surfaces, as well as clothing and activity of the person.
Thermal comfort: main factors
- Air temperature: The ideal temperature for thermal comfort usually varies between 20°C and 24°C depending on the season and individual preferences.
- Humidity: Air humidity also affects the perception of temperature. The optimal level of relative humidity for comfort is in the range of 30-60%.
- Air speed: A gentle flow of air can help to cool you down, especially in warm conditions, while a lack of it can increase the feeling of heat.
- Temperature of surrounding surfaces: Walls, floors, windows can radiate heat or cold, affecting the perception of temperature.
- Cloth: The amount and type of clothing affects the level of thermal insulation of the body.
- Physical activity: People who engage in physical activity feel more comfortable in lower temperatures.
Application:
Thermal comfort is a key factor in the design of heating, ventilation and air conditioning systems (HVAC). Maintaining optimal conditions helps improve the well-being, productivity and health of people in their living and working spaces.
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