Tmble drier - condenser ot the other type?

[TracyK]

Which one is more efficient. Will be in garage with no window for the tube thing to poke out of.

Which one do I need to buy?

Condensing one.

People generally say the other type are more efficient, but I'm very happy with my John Lewis Condensor (also kept in a garage). Takes 55 minutes to do a standard load.