Prestige is an outdoor Hot Tub which is made of heat treated Finnish pine. An elastic transparent material is “painted” on the inside of the Hot Tub. It provides a durable elastic surface that is easy to keep clean. The benches are integrated in the base and on the side walls. No water beneath the benches. Diameter 150 cm, water volume 1100 litres, alternatively diameter 180 cm, water volume 1600 litres.
HT180 Prestige Electric is a hot tub specifically designed for outside use where the climate remains above 10 degrees (celsius) and never below zero. If you have not noted 'winter usage', please find it here and read about filtration systems and use in colder climates. Regarding water hygiene you can read about it here and here in the manual for the AquaKing model.
As standard the Electric model comes equipped with a 3kW heater and that is not enough to keep the water warm if the ambient temperature is less than +10 degrees celsius. If due to location it is feasible, both wood and electric heating can be combined.