ElectroVapTM MC - electrode boiler humidifier

The ElectroVapTM MC delivers pure, sterile steam for raising the humidity in air handling units, air conditioning ducts or directly in a room.

Eight capacities are available from 5-90kg of steam per hour. The units can be used in a master/slave system with a maximum output of 990kg/h using one master unit and 10 slaves. All 11 units would be fully proportional to ensure equal wear.

The ElectroVapTM MC has been designed to make maintenance quick and simple. One button drains the unit, then simply unclip the cylinder and replace with a new one.
 The smarter steam humidifier
The ElectroVapTM MC has microprocessor control to provide responsive control over output. An easy-to-read backlit digital display panel shows what the unit is doing at any time. Three menus provide information on real-time humidifier performance, humidifier configuration and the opportunity to change the operating parameters of the unit.

The unit is very versatile, accepting all common modulating signals from humidity controllers or building management systems and, for stand alone situations, there's an integral humidity controller.

Standard on every unit is remote feedback for BMS users. Information on steam production and when maintenance is due is supported by a five fault alarm system indicating water supply failure, inlet drain valve failure and two-way contactor fault alarm, which shuts down the humidifier.
 ElectroVap™ MC - features
  • Extremely reliable operation.


  • Stainless steel electrodes as standard giving long cylinder life.


  • Can be used with softened or low conductivity water - 30-1000micro-siemens/cm.


  • 2.5-90kg/h steam output from a single unit.


  • Master/slave system producing up to 990kg/h steam.


  • Cleanable & disposable cylinders that can be recycled.


  • Proportional, stepped or on/off control.


  • Micro-processor control with LCD display as standard.
  • All units can accept a wide range of water quality and the software includes an adjustable anti-foaming system. Disposable or cleanable cylinders are available throughout the range, all with solid stainless steel electrodes for long life.

    To protect against water stagnation, the cylinders automatically drain after periods of inactivity. This adjustable feature prevents contamination and represents best practice in steam humidifier design.

    The ElectroVapTM MC range is WRAS approved for direct connection to a mains water supply.

    The unit is suited to wall or frame mounting and installation is made easy with a mounting template, single power supply and easily accessible internals.
     Sizing calculations
    In order to correctly size the ElectroVap humidifier you require for either an in-duct / AHU application or for use directly in-room please download and complete the appropriate Excel calculation pack below:

  • In-duct/AHU sizing calculation
  • In-room sizing calculation


  • If you require assistance or advice on model selection please call us on +44 (0) 1903 850200.
    Online purchasing

    Our range of ElectroVap in-duct/AHU and in-room units are available for immediate purchase online with free delivery. The in-duct/AHU models come in packages with steam hose and steam lances included. Optional extras include condensate separators, differential pressure switches, duct sensors and humidistats.

    Click your selected model below to buy online

    5kg/hr | 10kg/hr | 20kg/hr | 30kg/hr | 40kg/hr | 60kg/hr | 90kg/hr | 10kg/hr In-room
     Super-dry steam pipes for ultra-short evaporation distances
    Super-dry steam pipes for ultra-short evaporation distances


    For critical applications that require ultra-short evaporation distances, the JS MultiSteam pipework is available. This can be supplied fully assembled or in a flat-pack for convenience.

    These pipes guarantee condensation-free, dry steam delivery, due to the nozzles that collect steam from the centre of the pipework - where it is at its hottest and driest.