Wellness: health and well-being
Immersed electrode humidifiers
The use of steam baths, Turkish baths, or hammams, as they are called in the Middle East, dates back to the times of the ancient Greeks and Romans...
CAREL solutions for hospitals and healthcare structures
Immersed electrode humidifiers
Control and management of air humidification in healthcare structures is needed to reduce the risk of contagion and ensure the comfort of healthcare workers, patients and visitors.
Air Humidification
Immersed electrode humidifiers
Ever since the company was founded in 1973, CAREL has stood out as a company at the cutting edge in the research and development of new technological solutions

Immersed electrode humidifiers

Immersed electrode humidifiers
  • General characteristics

    This product is available in CAREL CPQ, the sizing and selection tool that lets you independently find the right CAREL solutions for you, download the related documentation, receive support, and generate quotes and orders.


    The operation of immersed electrode humidifiers is based on a very simple physical principle. As common drinking water contains a certain quantity of dissolved mineral salts, and is consequently slightly conductive, applying a voltage to metal electrodes immersed in the water creates an electric current that heats the water (Joule effect) until boiling, thus producing steam.
    The quantity of steam produced is proportional to the electric current, which is in turn proportional to the water level.
    This electric current is measured by a current transformer: by varying the level of water using a fill solenoid valve and due to the evaporation process, the current, and consequently steam production, can be modulated. Due to evaporation, the level of water decreases and must therefore be topped up. As the steam produced does not carry mineral salts, the salt concentration in the water and therefore the conductivity increases, and has to be periodically diluted by draining part of it using the drain pump and replacing it with new water.
    In addition, scale forms over time and covers part of the cylinder, which must be replaced or cleaned. The principle is simple, however the development of an immersed electrode humidifier that ensures safe operation and reliability over time requires careful analysis and extended testing.
    Compared to electric heater or gas-fired humidifiers, immersed electrode humidifiers:

    • are less expensive to purchase;
    • operate with drinking water (not completely demineralised or softened);
    • require periodical replacement (or cleaning) of the cylinder;
    • feature modulation suitable for comfort or industrial applications, without extreme requirements.


    CAREL has been manufacturing immersed electrode humidifiers since the 1970s and can draw benefit from its know-how in the field of electronic controllers: precision control, reliable electronics and sophisticated and complete control software.
    The CAREL solutions for immersed electrode humidifiers are humiSteam and compactSteam.


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  • Plus

    • AFS system (Anti Foaming System): detects foam to prevent the release of droplets together with the steam;
    • works on mains water with a conductivity between 75 and 1250 ┬Ás/cm, and its control software automatically adjusts operation according to the characteristics of the water, so as to optimise operating life without maintenance.
    • large cylinders galvanised electrodes and anti-scale filter at bottom for extended maintenance-free operation; openable cylinders also available;
    • steam production with continuous modulation from 20% to maximum capacity (10% for models with two cylinders);
    • built-in conductivity sensor and control software to optimise energy efficiency and maintenance costs, with constant performance throughout cylinder life;
    • automatic water drain after 3 days of inactivity
    • choice between three controllers: "Y" (proportional or ON/OFF from external controller and icon display), "X" (modulating with built-in controller based on pCO technology and alphanumeric and graphic display with extended text messages), "W" (similar to "X" but dedicated to steam baths);
    • model "X" manages a limit probe, used to limit the maximum relative humidity at the outlet, avoiding condensate formation in the duct.