Hot Spring, Cal Spas and Lifesmart are popular hot tub manufacturers, according to a March 2015 Consumer Search comparison. Coleman and Comfort Line Products are also well-recommended brands.
The SX is one of the most popular hot tub models produced by Hot Spring. It seats three adults and has 17 jets. The SX also has one oscillating massage jet.
Cal Spas produces a variety of hot tubs, including the luxurious Platinum Series. The largest model in this series is the P-880B, which seats six adults and has 80 water jets. This insulated tub is energy efficient, and includes a comprehensive, self-contained water sanitation system.