The new Dually™ Spas are an impressive line of energy efficient luxury spas, designed to relax your mind and body while using less energy than the average hot tub. The difference is the revolutionary Dually™ Pump which is hands down the most cutting edge system available. It uses 50% less energy and circulates 100% of spa water throughout the entire spa for the duration of each filtration cycle. You will enjoy a soothing hydrotherapy massage from head to toe with strategically placed jets to target various muscle groups in your body affected by stress and hard work. Let Cal Spas new Dually™ Spas take you to a place of calm and tranquility. 2015 Cal Spas Dually Spas Archived Parts Reference Page.