Dehumidifiers are used to remove trace amounts of water in the air. Humid air can cause Mould or Mildew to grow which pose numerous health risks. After using a caravan in damp or wet conditions it is good practice to use a dehumidifier to lower the moisture in the air and prevent condensation and any issues it may cause.
Dehumidifiers come in a range of types and designs. The most common type is a Moisture Trap, these are filled with crystals that extract the water from the air and deposit it in a lower tray. Some of these types are refillable by simply replacing the crystals after a certain amount of time.
Some Dehumidifiers are electrical and draw moisture from the air via extremely low powered heating elements. These types have indicators showing when they need emptying or recharging, and can be sustained for 3 to 4 months before charging.
Dry-Bag dehumidifiers are designed to absorb damp directly from the air. Rather then dropping it into a tray or container, the material in the drybag holds on to the water and can be disposed of safely after a few months. Dry Bag types change colour and once darkened off you know its time to replace.