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, so you can count on faster temperature changes and more stable temperatures in cold weather.
True - Rule of thumb: and most tubs tend to heat faster as the temp gets around the 100 mark, but this is a good rough idea.
Resisting all my Michigan JokesGo with the 240, you will be much happier in the long run. Perhaps your salesman was a siberian transplant and considers the lower peninsula as the tropics?
The practical consequence of this to the consumer is that the 220 VAC unit, by drawing less current to do a certain amount of work (i.e. pump and heat the water), will cost approximately half as much to operate in terms of your electric bill.