You can enjoy lower monthly operating costs with Hot Spring Spas energy-efficient spas.  Hot Spring Spas makes your spa energy-efficient by: Totally insulating every Highlife Collection model with multiple layers of high density, polyurethane foam that’s also used to insulate commercial freezers Using the innovative FiberCor insulation in the Limelight Collection models, which fills the cabinet completely to a density that is 4 times greater than the ½ lb. foam used on most spas Manufacturing all spa covers to ensure a custom-fit and tight seal to lock in warm air, and have a dense foam core with a high R-value for insulation Continuously circulating spa water with the SilentFlo 5000 circulation pump that uses less energy than a 40-watt light bulb Featuring the powerful WaveMaster jet pumps dedicated to powering the jets and are only activated when you need them Featuring the SmartJet system that lets you direct power only to the jets you choose, for less horsepower and energy Designing our own heaters to maximize the transfer of heat to the water for maximum efficiency Featuring our patented pump shroud that transfers heat from the equipment compartment to the water to utilize pump exhaust heat, minimizing water cooling and energy consumption Featuring dimmer-controlled LED lights that use less energy than a standard light bulb in all models