Heater humidifiers

Immerse heater humidification is becoming increasingly required in work specifications where:

• Humidity must be controlled precisely (museums,   laboratories, clean rooms);

• Water quality is not constant or is problematic (for example, aboard ships);

• Periodical maintenance needs to be minimised (using demineralised water).

    Immerse heater humidifiers, unlike immerse electrode units, can operate on demineralised water, as they do not exploit the electrical conductivity of the water.

Periodical maintenance can therefore be greatly reduced, due to the minimum formation of lime scale.

Weighing against this, the resistive elements must always be completely immersed in the water, to avoid overheating, unlikely the situation with electrodes, in which the water level is adjusted to modulate the flow-rate of steam.

The operation of an immense heater humidifier then requires water level sensors to ensure complete immersion of the electrodes, as well as components (solid state relays) that adjust the amount of heat transferred to the water so as to precisely modulate steam flow-rate.

These characteristics make the heater units more complex than their counterparts with electrodes, yet independent of the characteristics of the water and with much more precise modulation of the flow-rate. In addition, as heater humidifiers are intrinsically subject to overheating, the quality of design and the presence of safety systems are essential to ensure reliable service over time.

The Carel solution in the market segment offers the maximum in constructional quality and performance, meaning excellent reliability over time and extreme precision of control for the more critical applications.