There are basically two types of dehumidifier - a simple one which works like a refrigerator or freezer, usually cheap and reliable - downside is they dont work below 8c. The other sort is a continuos desiccant type which works down to freezing point - more expensive and probably better for car storage use. The one I have is a Meaco DD8L Junior Desiccant Dehumidifier 8 L. Works well and adds heat to the garage, though not as energy efficient as the other sort. As they say - you pays your money....
