I ordered an AquaRest Elite 500, 5 person hot tub, 120 V, 29 jets, with the upgrade of the ozone generator and capable of converting to 240V. It is a molded one-piece unit, had good reviews, and several online stores and Home Depot sell them. My question is, why do people convert from 120V to 240V? Does the 240V give you more jet power and does it make a difference in the smaller tubs like I ordered? I don't have it yet. It is due to ship next week.