Abstract: An immersion structure (e.g., hot tub, spa, swim spa, pool, showerhead, whirlpool bathtub, and whirlpool bath) has a water treatment system that includes a nano bubble generator for purifying the water. The water treatment system can further include a gas generator that works in conjunction with the nano bubble generator to create a composition of liquid containing nano bubbles. The nano bubbles circulate in the immersion structure thereby cleaning the plumbing system and water. The water treatment system can be located within a cabinet housing the immersion structure. The system can be controlled (e.g., water treatment, operational parameters, cleaning boost, part replacement, etc.) by a user via a smart app on a client device.

Abstract: Insulated portable spas and processes for insulating spas are described herein. The processes can include filling the undercabinet cavity of the spa with insulative fiberglass while the spa is in an upright position. The insulative fiberglass can be blown-in through sidewalls of the box frame. The portable spas can include an insulative air barrier at the bottom of the spa.