Yes it needs a dedicated 220 VAC 60 amp circuit. Having Two 200 amp power panels in the house is nice sometimes..........
Only should cost about $1 a day to heat.
Screw the zero jet silent hot soak bath.......(that's what I have now that my present spa pump main shaft bearings are shot and growl)......I want hydro-therapy and deep tissue massage. If I wanted to just soak in warm water, might as well just piss your pants.
Always better to have the jets and not use them, than wish you had them and can only sit in a warm mud puddle.