Sal - I finally gave up and bought a dehumidifier just after Xmas this year. I found things had begun to corrode from the winter damp - bolt threads, bare ally panels, etc. Now I wish I had a few
oil leaks under the car to keep it safe! There was a fair bit of condensation on the engine block etc.
The dehumidifier stopped all that - one of the best things I ever bought for my garage. Of course, we do get a rather damp winter here!
Even now, there is still a fair amount of water coming from the discharge pipe every day , so I guess it works as well in summer. The only "hitch" I have found is that the unit tends to freeze up solid during really cold winter days - around the zero mark on the thermometer (OK, I know we don't get "really" cold days in comparison to some of you guys!)
HTH