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Energy Efficient Hot Tubs

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Often, the decision on what model of hot tub to purchase will be based on the lowest retail price. This can have immediate negative effects on your electricity bill. There are three elements to consider when searching for the most energy efficient hot tub.

- Cover:
The cover can be the most important element in terms of energy use. The warm air trapped between the water and the cover is abundant in energy. A small rip in a poorly constructed cover can increase heat loss and evaporation and will bypass the covers insulation. A quality energy efficient hot tub cover should be firm so it does not sag in the middle and insulated with closed-cell foam that is resistant to absorbing water. Investing in a cover with a high R-value and a long warranty is a good investment.

- Hot tub walls:
The walls of the hot tub should be insulated to the best possible level to ensure energy efficiency. Closed-cell insulation foam is more expensive, but it is stronger to physically support the structure of the hot tub and reduces heat loss. Low-grade hot tub designs may use a layer of rigid closed-cell foam and fill the rest with fiberglass. Although this will make the initial investment cheaper it will put your energy bill through the roof when the fiberglass gets wet and drops the insulation value to zero.

- Pump:
Separate pumps for water circulation and jets help improve energy efficiency. When one pump is used for both tasks, the motor will be running at low efficiency to perform the circulation of the water and will be creating unwanted heat when running at maximum for the jets.

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