A hot tub is the easiest of the three to fit into most gardens — plug-and-play models need only a firm, level base and a standard electrical supply, and they suit relaxing and socialising more than exercise.
A sauna takes up a similar footprint but offers a different experience entirely — heat therapy rather than hydrotherapy — and works well alongside an existing hot tub rather than instead of one, if space allows for both.
A swim spa needs the most space and the biggest budget of the three, but combines a genuine swim current with a hot tub-style seating zone in one unit, which suits anyone who wants an actual workout as well as relaxation from the same installation.
