From Which (NB 'Choose a poor condenser dryer and you'll still have to cope with damp air and the possibility of mildew' so check out the reviews!)
Electric vented tumble dryers
Vented tumble dryers take warm, damp air from the drum and vent it out through a hose. Almost all vented tumble dryers are electric.
Pros Electric vented tumble dryers are cheaper and generally use less energy than condenser models.
Cons Vented tumble dryers need to be positioned near a window or door to vent the air away.
Vented tumble dryer prices
About £100 will buy you an entry-level vented tumble dryer. A top-of-the range vented model will be about £700.
Best Buy vented tumble dryers start from around £180.
Electric condenser tumble dryers
Electric condenser tumble dryers remove moist warm air from the drum. It's then cooled inside the machine, and the resulting water is collected in a removable reservoir.
Pros A condenser tumble dryer can be installed anywhere ? it doesn't need to be near a window or wall. Because water from the drum is collected, steam isn?t an issue.
Cons Choose a poor condenser dryer and you'll still have to cope with damp air and the possibility of mildew. You need to empty the reservoir regularly.
Condenser tumble dryer prices
About £150 will buy you an entry-level condenser tumble dryer. A top-of-the-range condenser model will be about £800.
Best Buy condenser tumble dryers start at around £280.