FIR sauna heaters

For those of you with FIR (Far-Infrared-Sauna) saunas, does anyone have one that has the carbon heaters? If so, how do you like them?

I'm having the worst time trying to decide which sauna to purchase. It must be made out of poplar or basswood (for hypo allergenic reasons) but I can't figure out which heater is best. Each manufacturer says their own is best.

For those of you that have one with ceramic heaters, did you look at the ones with carbon heaters? IF so, what made you buy the sauna with the ceramic heater?

Thanks so much! Tweet