Aquatic’s Serenity 13 design is a smaller version of the company’s Serenity 11. Designed for smaller bathrooms, it measures 66 in. x 38 in. The air baths feature a 1 hp variable-speed air blower with a 600-watt air heating system. All free standing baths have a remote blower, and air channels feature an antimicrobial coating and an automated purge and dry cycle.