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All spas and hot tubs have one thing in common-- they heat water. The objective is to conserve as much of this heat as possible. Here's how:

Start With Your Spa Cover

Heat rises-- that's why we insulate the attics in our homes. In fact, although walls are also insulated, up to 85% of heat loss is through the roof.  The same principle applies to your spa. Many modern spas have well-insulated shells.  This helps a lot, but much heat loss will still be through the "roof" ...your spa cover!

Get an energy-conserving replacement cover

If your cover has deteriorated, heat leaks will occur at the hinge-fold and also on the spa shell rim due to improper seating of the cover edges.  More importantly, if your old cover has become very heavy, this indicates water-logging of the foam-core insulation.

Get the full story on Spa Cover Energy Savings

A waterlogged cover will have almost no R-value, wasting your heating dollars. A high quality DuraTherm replacement spa cover will not only save energy, it will also last longer, be more resistant to water absorption, and improve the beauty of your spa. If your cover is in good condition, make sure the tie straps are snug and latched when the spa is not in use. This will reduce heat leakage.

Heat radiation is the transmission of invisible infrared rays, a factor where traditional spa covers lose energy. All matter (including the warm water in hot tubs) radiates infrared rays outward, losing heat, unless these rays are reflected back. For example, foil-faced home insulation reflects about 95% of heat rays back into the house, helping to conserve energy. Hot water energy loss from radiation has been largely ignored by spa cover manufacturers, until now. DuraTherm has addressed this loss with our Energy Reflex upgrade. Radiant heat, which would otherwise escape and be wasted, is reflected back down into the spa water.
Energy Reflex

Creating Windbreaks

Wind breaks save hot tub heating energy Creating a windbreak around your spa is not just an attractive privacy solution. Cutting wind exposure can also significantly reduce heat loss. Shrubs, privacy panels, or fencing, as well as spa enclosures can all be effective windbreaks. Another solution is the use of a coverall.

Thermostat Settings

Lower the thermostat Modern spas come from the factory with a high temperature limit set at 104° F. By setting your temperature at 102°F (or even a bit lower) you can reduce overall energy consumption significantly since it takes disproportionately more energy to heat each additional degree.

Vacation Mode

Turn down the thermostat when you are on vacation. If you will be gone for a week or more during warmer months, you can set it at its lowest level or turn off the heater. In freezing weather, some heating must be maintained to prevent freeze damage to the pipes and plumbing, unless the spa is winterized and water removed from the plumbing system.

Off-Peak Heating

Operate your spa efficiently Many power utilities offer reduced rates during off-peak hours, when demand is lowest. Check with your power company for hours and details.

If your hot tub has a timer circuit, and off-peak heating is an option, consider programming the thermostat to heat during these times. If you have a well-insulated spa with a good cover, it will maintain its heat for several hours after the heater is turned off.

Air Jets, Lights and Blowers

Turn hot tub jets off, when not in use Air induction jets are wonderful features which provide soothing massage to the home spa experience. But as they induce air into the spa water, they also lower the water temperature. This heat will have to be replaced by the spa heater.

The energy impact will be minimal during bathing sessions, but remember to shut-off air and water lights when the spa is not in use.

Powered air blowers used to be popular, but have fallen into disfavor. If you are buying an new spa, we highly recommend not buying one with an air blower motor. Not only are they loud (sounding like a vacuum cleaner!) air blowers consume a lot of energy, and will actually lower the water temperature rapidly, wasting even more.

Better spas, such as our Belize brand, have adjustable hydro jets which induce warmed air (heat-recovery) from the equipment cabinet into the water. This is a much better system than having a motor-driven blower.

Monitoring Energy Consumption for Savings

Everybody wants to save money on their home electricity bills, but it's hard to tell how much energy we are using at any given time. Which appliances, lights, fixtures, or habits are making the electricity bill rise? How much is the spa using? By the time we get the utility bill at the end of the month, it is too late to tell where power was wasted or how it could have been saved. But not anymore!

The Power Cost Monitor provides clear, accurate, real-time electrical consumption information. This helps you make simple changes to your energy usage patterns that can save serious money by identifying waste, or shifting use to off-peak rates.
Power Cost Monitoring System

Hot tub owners report that they have saved enough wasted energy in other areas of their homes to pay for much, if not most of the cost of spa operation, just by installing and using the Blueline PowerCost Monitor!

Now its easy for all spa owners to monitor hot tub energy usage: how much power your spa draws when heating, high or low speed, when in standby mode, etc. This allows you to program your spa controls for off-peak heating and maximum energy efficiency, while maintaining adequate filtration cycle time. The whole family will enjoy watching the monitor (imagine kids, eager to turn off unneeded lights!) The Blue Line Power Cost Monitor is a great little investment that can pay for itself in no time.

Filter Cartridges and Plumbing System

Service filters Clogged or worn-out spa filters will reduce the circulation of your spa water. This causes pump motor strain, and your heater element to perform less efficiently. Clean your filters with every water change, every 3 to 4 months with non-foaming filter cleaning compound. Replace annually to maintain your spa's peak performance. The result is both energy savings and cleaner water.
When changing your spa's water, its also a good idea to flush the plumbing system and heater element with Spa System Flush. This will help maintain unimpeded water flow and help keep your heater element working efficiently. Scale buildup on heater element

Floating Thermal Blanket

Floating spa blanket A floating thermal blanket is a small investment with a high return. It limits heat loss by insulating and reducing evaporation. This in turn helps keep moisture (and chemical) buildup on the inside of your cover to a minimum, increasing spa cover life.

Conserve Water

Conserve hot water Avoid wasting water, which would have to be replaced and reheated. Repair any leaks and adjust jets so that you're not sending streams of hot water on to your deck.

If Shopping for a New Spa

Sometimes the best approach is to replace an obsolete, energy wasting spa with a new one which can save 50% or more in heating costs, if you shop wisely. There are several things to look for in a new spa with regard to efficiency. Don't overbuy horsepower. Some manufacturers are playing the jet and horsepower numbers game. They offer more and more jets, which require higher and higher horsepower to feed the jets.

The design and engineering of a spa is much more important than the number of jets. A well engineered spa does not need a huge number of jets to provide soothing and vigorous hydro-massage. Remember, very large pump motors consume large amounts of power to run, and can result in huge power bills.

Read more about Belize eSeries hot tubs-- designed for maximum energy savings. Belize eSeries Spas
spa customers write  Consumer Reviews
DuraTherm Spa Covers ThermoFloat Blanket
"We've watched our electric bill since installing our new spa cover (it's beautiful, by the way!) and [ThermoFloat] blanket last spring and estimate our annual savings will be about $170. We'll probably save about that much again by getting our supplies from you. Thanks to The Spa Depot for the great service and prices."

Susan Trump
Salem, MA


Spa Depot, The, Spas & Hot Tubs - Dealers, Olympia, WA

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