Sue
Why not just go for an air conditioner instead - they dehumidify (just watch the water coming out of their outlet when it's humid) + you can use for heating in the winter?
Maybe you are thinking of running a dehumidifier to a drain outlet when you aren't there - if so forget I wrote the above.
Large fans - just about everywhere - Migros, Gima, Erin Spot +++ No idea of where to buy in Ovacik though.
Linda