Improving the Energy Efficiency of Hot Tubs

Updated: January 20, 2021Written by: Kate Pospisil

How to Improve the Energy Efficiency of Your Hot Tub

While hot tubs are often associated with luxury, their energy usage can surprise many homeowners. However, with a few smart choices, you can significantly improve your hot tub’s energy efficiency — without sacrificing comfort. Here’s how to save energy and lower your utility bills while still enjoying your hot tub.

Key Features for Energy-Efficient Hot Tubs

When choosing a hot tub, there are several key factors that directly impact its energy efficiency:

• Insulation: Proper insulation is essential for maintaining water temperature without using excessive energy. Look for high-density foam that fills the entire cabinet, which helps keep the water hot with minimal energy consumption. Adding thermal blankets on top of the water or around the cabinet can further improve insulation.
• Dedicated Jet Pumps: Hot tubs that have separate pumps for circulation and jets consume less energy. This allows the circulation pump to run less often, saving energy and money over time.
• Insulated Cover: A high-quality, tightly-sealing cover with dense foam insulation helps prevent heat loss. Look for covers with a high R-value, which measures their insulating power — higher R-values mean better energy efficiency.
• Heater Type: While 240-volt heaters are common, they use more energy than 120-volt heaters. If possible, opt for a 120-volt system to enjoy immediate energy savings.
• Size: Bigger isn’t always better when it comes to hot tubs. A larger tub uses more energy, so choose a model that fits your needs, considering how many people will use it regularly.

Additional Energy Efficiency Considerations

We’ve covered some issues that come along with particular models of hot tubs. But there are some points you can control, such as where you place the tub and how often you use it. Let’s take a look at what you can do to improve your hot tub’s energy efficiency.

• Placement: An indoor hot tub will naturally use less energy due to the consistent ambient temperature. If your tub is outdoors, providing shade can help reduce energy use by preventing the sun from overheating the water.
• Seasonal Use: Hot tubs require more energy in the winter because the heaters work harder to maintain a warm temperature against the cold air. During warmer months, the water heats up faster, reducing energy consumption.
• Temperature Settings: Lowering your hot tub’s temperature by just 10°F when not in use can save up to 5% on your energy bills. When you’re ready to use it again, the energy required to heat the water back up will be minimal.
• Maintenance: Regular hot tub maintenance ensures that the pump, filtration system, and jets are working efficiently. Keeping the water clean will also reduce the need for frequent water changes, which can save both water and energy. If your hot tub allows, program the filtration and pump systems to run during off-peak hours to save energy.

Fix Leaks and Keep Covers Secure

Leaks can dramatically reduce your hot tub’s efficiency by allowing water to seep into the foam insulation, reducing its effectiveness. If you notice any leaks, fix them immediately and replace any foam that has become waterlogged.

Also, ensure that the cover latches are functioning properly. A loose or broken cover can result in significant heat loss, wasting energy and increasing your bills. A tight-fitting, secure cover is one of the easiest ways to keep your hot tub energy-efficient.

Final Tips for Energy Efficiency in Hot Tubs

With the right features and a bit of care, you can make your hot tub energy-efficient and cost-effective. Choose a model with excellent insulation, energy-efficient pumps, and a quality cover, and adopt energy-saving practices like lowering the temperature when not in use. Regular maintenance and prompt repairs also help keep your hot tub running smoothly and efficiently.

Consider consulting with a professional to help with installation, maintenance, or any necessary repairs. With the right care, your hot tub can be a relaxing and energy-efficient addition to your home for years to come.