Can I get this device in a 3 phase to reduce electrical cost?
This sauna plugs in to a 120 volt, 20 amp outlet, standard single phase.You'll want a dedicated outlet for best performance.
They need the voltage when running, but do not use much power. At a total of 2250 watts, think of it like using an oversized toaster or hair dryer.
The the electric cost is really very minimal.