Have some unseasonally cold weather last couple days . Tubs cool sides range from 77-76
I increase the hot side to 92-94 to hopefully bring up cool side which seems to have done by 2 degrees. I plan to buy thermal curtains to keep in heat during winter..

Question is would getting a space heater as opposed to heating entire house I use propane @ 1.28 cu ft.is my rate according to my bill.

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