28. Turn down the water temperature. Hot water heaters are normally set at 140 degrees. Moving them down to 120 degrees can save as much as 5% to 10% on water heating costs without sacrificing warmth. 29. Lower the thermostat. You can save as much as 10% a year on heating and cool...
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sure if the commercial hot tubs with the 220v service would do the same thing or if the bigger heaters would keep up better. in the summer we do not keep the tub as hot we keep it at 94 and we have stayed in for almost an hour at times and the tub stayed at 94 the whole time...