- suitable for sauna massage pool, swimming pool, massage bathtub, hydrotherapy pool and keep-fit equipment. -can select stainless steel or titanium or other heat exchanger -will be adjusted in advance, before delivering from manufacturer. Machine can be used after connecting with pipes and power. -control temp 3-40 -refrigerated capaciy 4900kcal/h -129400 kcal/h (5.6kw ¿c 150 kw) -theres air-cooled type and water-cooled type.