The most common feedback we receive on indoor air as it gets cooler outside is about draughts and cold. Hoas properties are connected to a district heating system and the heating is adjusted automatically by thermostats according to outdoor temperature.

Large drops in outdoor temperature can make you feel cold before the indoor temperature can adjust to the change outdoors. As the temperature rises and drops, the windows of the apartment will respond to the change in temperature immediately.

Healthy indoor air and energy efficiency

Hoas' target temperature for the apartments is not random; it is based on general recommendations on healthy indoor air temperature. The correct room temperature is 20–22 degrees. According to the healthy housing guide published by Ministry of Social Affairs and Health (in Finnish), indoor air that is too warm can increase tiredness, lower one's ability to concentrate, cause respiratory symptoms and a feeling of dryness. It can also accelerate the release of impurities in the form of gases. 20–22 degrees is also the room temperature recommended by the indoor air association.

It must also be noted that the cost of heating a property is significant. As a rule of thumb concerning energy use, every extra degree of room temperature raises the cost of heating by about 5 percent. In terms of a single apartment, heating can account for up to half of total energy consumption, so this is something to consider.