How dehumidifiers work

The challenge

Atmospheric air contains moisture which is a problem to materials and manufacturing processes.

Protect your environment

Even when you cannot see it, moisture in the form of water vapour is all around us, held in suspension in the air. The relative humidity of the air in many cases determines the extent of corrosion of certain materials, the speed at which moulds develop and the rate of increase of bacteria that cause decay. Most materials and goods are best stored under cool dry conditions.

Corrosion speed of steel

Relative humidity

Relative humidity (RH) is the expression used to define how much water vapour can be held in the air at a given temperature as a percentage of what it could contain at saturation (100% RH). That is when the relative humidity reaches the level at which air can hold no more moisture. The maximum amount can vary according to its temperature – warmer air is capable of holding more moisture than colder air.

A false economy

Traditionally the problem was disguised by the use of heat or ventilation. This process is exceptionally energy inefficient and reliant on introducing outside air that is generally not suitable unless expensively heated. Drying by traditional heating involves continuously warming a stream of outside air on a constant ‘in and out’ cycle.

The solution

The answer to this problem is Calorex’s wide range of dehumidifiers suitable for every environment from warehouses and sub-stations to museums and garages.

A better way

Dehumidification is much more sophisticated than heating. It recirculates the same air and physically removes moisture from it. This alleviates the need to continuously reheat incoming air. Not only that, a dehumidifier will cleverly convert energy taken out of the room as moisture (latent energy), to create ‘sensible energy’ that can be used to heat the room, accelerating the drying process.

Problem solved

Our wide range of units and operating temperatures ensure there is a system to fit every need. From high tech problems requiring sophisticated ‘total loss’ or ‘keep dry recirculation’ systems to a simple off the shelf mobile dehumidifier to plug in and go - Calorex are unique problem solvers in their field.

How a Calorex dehumidifier works

The process of dehumidification involves moisture-laden air being drawn into a dehumidifier where the air passes across a refrigerated coil. The air is rapidly cooled below its dew point, condensing the water vapour and recovering its latent heat energy for re-use. The cooled air is then passed across the condenser where it is reheated and returned to the served area at the required lower relative humidity.

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Dantherm Group UK

Marcus Bailey

Direct: +44 (0)1621 878 539
Mobile: +44 (0)7834 180 838

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