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I just installed a used hot tub on my patio and I am wondering how much it will increase my electric bill?

  •  By: Bob
  •  On: 01/27/2011 12:00:08
  •  In: Ask Bob

The actual usage will depend on several factors such as size of the tub, the outdoor air temperature, the insulation levels of the tub and how often the top is off the tub...

The actual usage will depend on several factors such as size of the tub, the outdoor air temperature, the insulation levels of the tub and how often the top is off the tub. Older hot tubs average between 10 and 20 kwh per day. That translates to about $25 to $50 per month on your power bill. Newer, energy efficient models use between 5 and 7 kwh per day or about $12 to $17 per month. Here are a few tips to keep your hot tub usage as low as possible:


Set the hot tub heater thermostat to maintain 102°F -Which is the temperature recommended by most health departments for adults and children. Some hot tubs have been factory-set to heat water to 104°F.


Turn down the thermostat when you’re on vacation - If you are leaving for an extended period of time or won’t use the hot tub for a week or more turn the heat down or off. If you have an older, non-energy efficient hot tub, consider draining it if you will be gone during winter months.


Reduce pumping cycles - Normal filtration cycles are set to run for four hours, twice each day. You may be able to reduce the filtration cycle to three hours, twice each day. This  adjustment should be based on your usage pattern, so you can maintain clear, clean and safe water.


Use a hard (foam) cover with good insulating qualities - Standard covers have an average insulating value of R-12. Keeping your cover in good condition is essential because most heat loss will be through the spa cover.  Replace the cover if the interior

foam is broken or water saturated. A waterlogged cover will increase heat loss and energy consumption.


Make sure the cover and tub lip fit snugly. Use the straps to latch the cover when the hot tub is not in use; this will also reduce heat loss. Lift systems will help increase the life of your cover.


Add a floating blanket - An energy-efficient floating thermal blanket will help retain heat and reduces the amount of moisture building up on the inside of your hard cover, extending its life. Adding a 1/4 closed-cell foam, floating blanket under the hard cover can increase the total Rvalue to 16.


Drain the hot tub only when necessary - Maintaining a proper chemical balance will reduce the number of times the tub needs to be drained. Hot tubs that are heavily used should be drained every 3 – 4 months.


Create windbreaks around the hot tub - Cutting wind exposure can reduce heat loss. Privacy panels, landscaping, or fencing can all be effective windbreaks.