Education

Materials and technologies

Discover the world of saunas and wellness. Our dictionary will help you understand all the important terms and concepts related to sauna use.

Cooling Tub

A cooling tub is a wellness device designed for brief immersion of the body in cold water, typically in the range of 3 to 15 °C. It is used mainly after a sauna session or physical exertion to cool the body rapidly and stimulate physiological responses. The principle relies on sudden cooling of the skin, […]

2-in-1 Sauna + Hot Tub (Combined Wellness)

A 2-in-1 sauna + hot tub is an integrated wellness system that combines a sauna and a hot tub, or hot bathing tub, into a single structural or functional unit. Both units can be physically joined in one enclosure or positioned side by side as part of a single design solution. The purpose is to […]

Western Red Cedar (Red Cedar)

Western Red Cedar is a premium softwood originating from North America, most commonly from the tree Thuja plicata. In wellness and sauna applications, it is used for wall and ceiling cladding and sometimes for exterior structural elements. It is characterised by low density, high dimensional stability and a natural content of aromatic oils and thujaplicins, […]

Aristech Acrylics® (USA)

Aristech Acrylics® is a US manufacturer of premium acrylic sheets used to produce shells for hot tubs, pools and wellness equipment. The material is continuously cast acrylic (PMMA – polymethyl methacrylate), characterised by high density, non-porosity and a homogeneous structure. It forms the interior surface of the hot tub, which is in direct contact with […]

Thermo Wood

ThermoWood is timber modified through a controlled thermal process at temperatures of approximately 160–215 °C in an oxygen-free environment, without the use of chemicals. The treatment reduces moisture content and breaks down part of the hemicelluloses, which substantially improves the material’s dimensional stability. The wood becomes more resistant to rot, mould and biological pests. It […]

AISI 316 (Stainless Steel)

AISI 316 is a high-grade austenitic stainless steel containing chromium, nickel and molybdenum, designed for use in aggressive and humid environments. The presence of molybdenum significantly increases corrosion resistance, particularly on contact with chemically treated water, chlorine or a saline environment. In the wellness sector, it is used to manufacture jets, structural elements, fasteners and […]

Incoloy® 800/825

Incoloy® 800 and Incoloy® 825 are high-performance nickel-iron-chromium alloys engineered for extreme temperature and corrosive conditions. They are used as the material for heating elements in electric heaters for hot tubs, bathing water, and wellness systems. Their high nickel and chromium content gives them exceptional resistance to oxidation, corrosion, and chemical damage caused by disinfectants […]

WiFi Module & Smart Control

The WiFi module & smart control is a communication hardware accessory that connects a hot tub, sauna, or cooling tub’s control pack to a home WiFi network and a mobile app. The module acts as a bridge between the device’s local electronics and a cloud-based or local control interface. The user can remotely monitor system […]

Chiller (Active Water Cooling)

A chiller is a device designed for active water cooling using a compressor-based refrigeration circuit, similar in principle to a heat pump or air conditioning unit. In a wellness context, it is used for cooling tubs, cold plunge pools or combined hot and cold systems. Water circulates through a heat exchanger (often titanium, for its […]

Balboa Water Group® (USA)

Balboa Water Group® is an established American manufacturer of electronic control systems and components for hot tubs, spa systems, and wellness equipment. Their products include control packs, control panels, heaters, sensors, and communication modules that manage all key hot tub functions. The control pack functions as the system’s “brain” – it manages water temperature, filtration, […]

Sauna Stones

Sauna stones are natural or volcanic rocks placed on the sauna heater’s heating element, where they store heat and release steam (löyly) when water is poured over them. A suitable stone must withstand repeated sharp temperature shocks without cracking or breaking apart, so dense, homogeneous rocks such as olivine, peridotite, or vulcanite are preferred. The […]

Thermal Cover (Hot Tub Insulating Cover)

A thermal cover is an insulating hot tub cover that closes over the water surface when the hot tub is not in use. Its main function is to limit heat loss and slow water evaporation, reducing the energy needed to maintain the set temperature. The cover typically consists of a rigid closed-cell foam core wrapped […]

Powder Coating (Komaxit)

Komaxit is the regional term for a powder coating based on epoxy and polyester resins, applied to metal surfaces by an electrostatic process and then cured by baking at high temperature. In wellness structures, it is used to finish steel and aluminium components such as heater frames, structural fittings, or metal parts of pergolas, where […]

Sauna Heater (Stove)

A sauna heater, or stove, is an electric or wood-burning appliance that heats the air in the sauna cabin and simultaneously heats the sauna stones placed on top of it. Pouring water onto the stones produces a short burst of humidity (löyly), which raises the perceived temperature without changing the actual air temperature. Electric heaters […]

Heat Pump (Hot Tub Heating)

A heat pump is a hot tub water heating device that, instead of converting electrical energy directly into heat, transfers heat from the surrounding air into the water through a refrigeration circuit. The principle is the reverse of a chiller used for cooling. The same technology extracts heat from outdoor air even at low temperatures. […]