Hydraulic design and filtration also have played a role in improved efficiency.

“New technology has been incorporated over the last several years to improve filtration turns while actually reducing the energy required by as much as 30 percent,” notes Samantha Sarles, communications manager for Watkins Manufacturing in Vista, Calif.

Smarter pump programming is at the heart of these savings, but hydraulic design has also become increasingly important. Spa manufacturers are spending more time looking at hydraulics of water flow to use less plumbing and pumping power.

This has allowed designers to install smaller pumps to avoid wasted amperage. And it’s not just to be green. The more affordable a hot tub is operationally, the greater potential it has for the market.