- Aa Since 1963 when Airmist Sauna & Steam was founded as Finnish Sauna Builders, we have earned a great reputation by providing residential and commercial consumers with first class saunas and steam rooms. All of Airmist's cedar sauna kits, prefab saunas, and custom saunas are designed and built according to the customer's specifications. For people who prefer more humidity and less heat, we have ...www.airmist.com