Specialist application knowledge is key to selecting the correct dehumidifier – with either refrigerant or desiccant technologies – for each project.

Refrigerant Dehumidification

Refrigerant dehumidifiers from Hidros in Italy, operate by the air being passed over a cooling coil to drop the temperature below its dew point.

Extraction rates from 25 litres- 3000 litres/24hrs can be achieved, depending on unit size, and this can either be via a fitted condensate pump or simply drained out via duct work. Some units may be placed on castors for portability, but more often are fixed wall mount models, or fixed bracket ceiling mounted versions, and even a through-the-wall solution.

Hidros refrigerant dehumidifiers provide the solution for applications such as swimming pools, car storage, museums and galleries where the space is heated.

However, refrigerant dehumidifiers cannot operate at very low temperatures (below 1 ⁰C) – for this desiccant technology is required.

Desiccant Dehumidification

Cotes desiccant dehumidifiers will operate at much lower temperatures than a refrigerant machine and will continue to extract moisture from the air even in very cold (sub-zero) conditions, although the air doesn’t hold much moisture under these conditions.

Desiccant dehumidifiers use a silica gel desiccant rotor to remove moisture from the air, and are ideally suited to cold unheated environments such as storage facilities and cold rooms – where the temperatures could be as low as -10⁰C – to stop the humidity from dropping moisture on the cooling coils causing them to ice up, or to achieve very low humidity in applications such as in the pharmaceutical sector or lithium-ion battery manufacturing.