Here you go

High Tech Health is a legitimate very low emf sauna. This is the one Dr Mercola uses, he's a psychopath when it comes to avoiding nnEMFs, he even wrote a book on the subject.

Clearlight sauna is another legitimate very low EMF sauna. This is the one Ben Greenfield uses. He's also a EMF psychopath.

There's also a company called Sauna Space thats zero or low EMF. But they use a tent set up and big red light type bulbs that get super hot. It's a hassle to use is the word on the street.

The first two are going to be triple the price, maybe more, of the cheap models you find on Costcos website.

At some point (in the near future hopefully) I'll be using some if my you know what to buy one of the first two manufacturers listed above 😁 I also want a traditional dry Finnish sauna to rotate days like Siim Land does 👍