Any experience of dehumidifers?

If they are worried about condensation, it would be a lot cheaper to dry the washing with the window open a couple of inches rather than run up the electric bill by using a dehumidifier. Is there no way they can hang the washing on a line outside to remove most of the dampness? Even in the winter, as long as it's a dry day, 90% of the moisture can be removed on a washing line and it's free (once you paid a few quid for the line)

A dryer, condensor or otherwise, is not an option as there is not the space.

the laundry will be damp, well spun from the washing machine, but not soaking wet.

Could they not buy a condenser dryer. It doesn't need an outlet pipe as the water is condensed into a container that you empty out.

Condensation is a major problem for landlords (speaking from experience). Rooms need to be ventilated even if the heating is on. One of our previous tenants complained about condensation but it was 90% down to them not turning on the bathroom and kitchen extractors and never opening any windows. Our current tenant is older and more sensible and has never had a problem with condensation !!

I have an Ecoair desiccant dehumidifier. You need a desiccant type if you are using it in a cold room such as a garage as non desiccant types do not operate properly below a certain temperature. The one I have will also dry laundry as it gives off a little heat. This would be ok for damp laundry but not wet laundry. The desiccant types are quite expensive to buy - mine was over £100. You can either empty it every time it fills with water from the air or you can tube it into a bucket.

I have mine in a storage room below the house which has no windows and would otherwise get very damp. The heat is useful as we store logs in here and it helps the drying out process.

Looking forward to the replies, I've just moved into a bungalow and the inside of the double glazed windows were sopping wet the other morning. My neighbour said they have a karcher to suck the condensation from their windows.
I've had a look around and the prices and sizes really vary.