There is no uniform "ideal" temperature and humidity that is exactly right for everyone and every room, but there are clear guidelines that most people find comfortable.
Ideal temperature per room
- Living room: 19 to 21 degrees
- Bedroom: 16 to 18 degrees, which is more comfortable for most people when falling asleep
- Bathroom: 20 to 22 degrees, slightly warmer because of wet skin after showering
- Home office: 20 to 21 degrees, as a lower temperature can quickly feel cold when working at a desk
Ideal humidity
For almost every room in the house, a relative humidity between 40 and 60 percent is considered comfortable and healthy. Below 30 percent, the air can contribute to a dry throat and irritated eyes. Above 60 percent, the risk of condensation on windows and mold over time increases.
Why temperature and humidity are connected
Humid air feels more oppressive in warm weather, while dry air in winter can make a room feel colder more quickly, even though the thermometer shows the same temperature. That is why it is more useful to look at both values together rather than at temperature alone.
Difference between winter and summer
In winter, the outdoor air is often dry, and heating causes a further drop in indoor humidity. In summer, the opposite problem is more likely: warm, humid outdoor air enters through open windows. It is therefore normal for your target to shift slightly per season, as long as you stay within the range of 40 to 60 percent.
How do you measure and regulate this in practice?
A simple hygrometer can quickly give you insight into the humidity. If it consistently reads above 60 percent, for example in a bedroom, bathroom, or basement, a Dynter AirPure DH251 dehumidifier is a direct way to bring it back down to a healthier level. In our experience, combining good ventilation with targeted dehumidification in the dampest areas of the home is more effective than simply turning up the heating.