How to make cleaner air in the house

Cleanliness of air in room, where you are long time, influences to your health. Some advice how to clear air:

often air rooms, even in a cold season try to open a window or window leaves not for long time;
often vacuum clean rooms;
establish in a bath and kitchen extractors for steam removing;
not less once per one year invite the expert. He will check up gas devices and working of ventilation;
get more room plants. They well humidify and clear air;
if in a room there are no plants, put bowls with water;
choose fabrics for houses, clothes and linen from cotton, wool or flax. Synthetic fabrics are harmful, they cause infringement of balance of positive and negative ions;
switch off electrodevices, when you do not use them, for maintenance of ion balance.