In winter we tend to turn the heat on a lot more. This means that it’s pelasantly warm in the house, but this heat causes the air to become more dry in the house. The dry air is not only unhealthy for us, but also for our pets, plants and unfavorable for natural products like wood. During prolonged periods of low temperatures, the relative humidity may barely reach 30%, whereas a healthy relative humidity is 50-60%.
A natural product like wood can shrink and expand. At a constant relative air humidity of around 50%, this change is kept to a minimum. This prevents cracks in your wooden furniture.