The Main reason to Choose a desiccant dehumidifier is that it can operate at much lower temperatures than a refrigerant type.

The 103 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. The devices are primarily intended to produce pure water, and the dehumidifying effect is viewed as secondary to their operation. When you extrapolate that across a day you’d be looking at >4 l so you can see why it’s an important factor, especially if your storing sensitive materials or objects. This happens continuously until the desired RH level (if you’re using a humidistat) has been reached.Vapor-selective active membrane energy exchanger with mechanical ventilation and indoor air recirculation".

Power Consumption - Generally desiccant type will use consume slightly higher energy cost compared to compressor type. A fan constantly draws the room air through the dehumidifier and over the cool metal plate(s) and all the time more and more of the moisture condenses onto the plate and drips into the dehumidifiers water tank.As we know from above, once air cools below dew point it reduces the amount of vapour it can hold this excess moisture condenses onto the cold surface, in this case the evaporator coil.