Had a FIR sauna for awhile, it was good but remember, saunas are beneficial in this order:

1. Salt bath- normal bath in a tub with Epsom salts to open the pores and for magnesium, this detoxes you the most, but uses a lot of water

2. Steam bath (this is wet heat- the best sauna; the American Indians did this in their sweat lodges, they knew what they were doing and the many benefits)

3. FIR sauna (this is dry heat, 2nd best compared to steam bath)

4. Normal sauna (again- dry heat, but without far infared)

Really any of the above are good, but they are listed in order from most effective, to least effective