Dry Air
Air is considered dry when the relative humidity is below 40%. The ideal humidity level is between 40% and 60%. Air that is too dry can cause various inconveniences in your home and affect your health, such as:
- Increased dust and static electricity
- Cracks in wooden furniture and flooring
- Development of viruses and bacteria
- Headaches, dry throat, eye irritation, and overall discomfort
In winter, when the outside temperature is 0 °C, ventilating a room allows only 4 grams of water per cubic meter to enter. Warming the outside air can abruptly reduce the relative humidity inside the room.
Here is a table showing how humidity levels change with indoor and outdoor temperatures:
| Outdoor Temperature | 4°C | 1°C | -2°C | -7°C |
| Indoor Temperature | 22°C | 22°C | 21°C | 22°C |
| Outdoor Relative Humidity | 78% | 82% | 71% | 68% |
| Indoor Relative Humidity | 38% | 33% | 28% | 20% |
Consequences of Dry Air:
- Out-of-tune musical instruments
- Dried wooden surfaces, such as floors
- Higher static electricity levels
- Increased dust levels
- Greater air pollution
To humidify overly dry air, using a humidifier is recommended to achieve ideal humidity levels.
