Inergize Spire Elite

Inergize designed the Spire in Italy and builds it by hand from sustainably sourced, wax-coated red cedar over a corrosion-proof 316 stainless interior - a combination no mainstream rival offers at this price. The vertical tub holds 120 gallons in roughly a 5-foot footprint, seats you neck-deep on a 12-inch contoured seat with a 10-degree recline (users to 6'4" get neck-deep immersion; up to 7 feet fit chest-deep), and pairs with a modular 0.8 HP chiller on caster wheels that can sit up to 6 feet away on insulated hoses. It cools to 37 F or heats to 104 F in about 3 hours by the company's figures, drawing 890W during active cooling or heating from a standard 120V/15A grounded outlet, with 2-inch insulated walls and a 3-inch lid holding temperature between cycles.

Water care is the standout spec: a 4-way system (strainer, 20-micron filter, continuous ozone at a claimed 400 mg/hr, and an air-intake filter) with automated ozone cycles from the Tuya app, and filter swaps every 2-4 weeks. The trade-offs are real, though. The warranty is 1 year on tub, chiller, and electronics unless you pay for a 3- or 5-year care plan, units ship in batches rather than from stock, and the page publishes no noise rating or tub weight - the full external dimensions live in a downloadable cut sheet rather than on the page. It is outdoor capable (IPX4) but not designed to operate in sub-freezing ambient conditions, which limits winter siting in cold climates.