Temperature perceived is determined by the combination of actual temperature and relative humidity.
The ratio of air humidity and temperature is proportional: the higher the temperature, the more air is capable of retaining steam.
De’ Longhi has identified ideal comfort standards: the graph below highlights the standards that achieve such conditions.
- difficult to sustain
- ideal
- sustainable
| Season | Temperature | Relative humidity |
| Winter |
21°C ÷ 25°C |
30% ÷ 75% |
| Spring |
24°C ÷ 27°C |
25% ÷ 55%
|