They are only very efficient in warm temperatures. The colder it gets the harder the dehumidifier has to work and the less efficient it gets - as it operates ba

They are only very efficient in warm temperatures. The colder it gets the harder the dehumidifier has to work and the less efficient it gets - as it operates based on a temperature differential. So I suppose, if you are running a dehumidifier in a cold room, you need to particularly consider how well it operates in cold, some dehumidifiers are particularly bad in that environment.