A condenser dryer doesn’t need to be by any plumbing and can be placed anywhere.
The water is evaporated and taken to a draw that you empty. You can plumb a condenser dryer to a drain if possible.
A Heat pump dryer tends to take longer to dry clothes as it doesn’t use a conventional way of creating heat. This makes it a very energy efficient way of drying clothes, and is normally an A or A+ in energy ratings.