Oxygen renewal promotes the production of steam. The interior of the waterproofed steam room becomes very quickly saturated with humidity with a hydrometry rate of up to 100%. This means the room will be hot and humid.
An air inlet in the lower section (generally under the door) as well as an outlet in the upper section (as far away as possible from the inlet) allows for oxygen renewal with a fresh air inlet necessary to create the steamy effect desired by the user. Steam reduces the volume of oxygen and so this renewal is also essential for the user's comfort. It is recommended to provide a minimum flow rate of 20M3/h per person.
Ventilation also makes it easier to maintain/clean the steam room. Outside periods of use, the humid air is pumped outside the steam room and allows the interior to dry, preventing the appearance of mould and fungi.

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