Be cool in your hot tub!

“It's over 37 °C outside, and we are staying cool in our Caldera® spa.”

With the CoolZone® hot tub cooling system, your Caldera spa can both heat and cool the water – something that is not possible in most hot tubs. This easy to use innovation expands your hot tub use, so you and your family can enjoy hot tubbing more, all year long.

Flexible and Energy-efficient

Similar to the way an air conditioner cools your home, the CoolZone® system cools spa water to as low as 15.5 °C. And when you’re ready to warm things up, the system works with your spa’s heater to efficiently raise the temperature in just a few hours. Depending on factors like ambient air temperature, the CoolZone® system even has the potential to lower operational costs by reducing the time required to run the standard EnergyPro™ heater that keeps the water hot.

Is the CoolZone® system right for me?

The CoolZone system from Caldera is a wonderful option for:


Hot tubbers living in hot climates


Families & grandparents with small children


Active Adults desiring cold water therapy

See Hot Tub Manuals

Tips & tricks for using your hot tub.