You can get an excellent non-toxic sauna from Long Life Saunas. They are all made in the US, so no sketchy components. And, the guy will make it out of whatever wood you want. I would suggest poplar/aspen or basswood. Also, they make near infrared saunas, not far infrared. I have one of the Eco Saunas and I love it. It has no glues, no wood finishes and no EMF radiation. I highly recommend it and have been very happy with it.