Finnish sauna is probably one of the most known things about Finland.
Sauna is an essential part of finnish culture. There is over 2M saunas in Finland for a population of 5M.
Saunas are part of many public facilities. You can always find them in sports halls, swimming pools, hotels, etc.
If a single-family house doesn´t have a sauna, this is rare exception. But most amaing fact is that even many condos, especially new ones, have their own saunas.
Finnish sauna heaters and sauna building packages are exported to many countries.