Picking barrel sauna wood is not like choosing a paint colour. Get it wrong, and you are dealing with warped panels, rot, or a sauna that just does not hold heat the way it should. Two materials keep coming up in conversations: cedar barrel saunas and thermowood barrel saunas. Both are genuinely good. But they are good in different ways, for different people, in different situations.
https://saunashield.co/blogs/news/cedar-barrel-sauna-vs-thermowood-barrel-sauna-which-is-better