How does a dehumidifier work

Working on the same principle as a refrigerator, moisture-filled air is drawn into the dehumidifier and passed over a cold, ‘refrigerated’ coil. The damp air condenses on the cold coil into water droplets which are collected in the water tank. The air is then passed over a warm coil and sent out from the dehumidifier, producing clean, dry air.

In cold conditions the water that is passed over the cold coil may freeze.
So, it is important that a dehumidifier has an efficient way of coping with this. Mitsubishi Electric Oasis dehumidifiers utilise a hot gas defrost system, enabling hot gas to be transferred into the cold coil, reversing the freezing process. Without this, a dehumidifier would have rely on the temperature rising or employ a power drawing heating system.

Upon first use, your dehumidifier will have to start to remove moisture that has accumulated in the wall linings, carpet and furnishings. For this reason, it is important to run the dehumidifier constantly for the first few weeks. Once a healthy humidity level is reached, the dehumidifier can be used to simply maintain this.