Allowing the moisture to stay inside the laundry not only causes condensation problems, it also increases the drying time!
The best drying air is the same as outside when it is hot and dry. The dryer will make the room hot. It will also make it wet.
Dryers take the air in from the room; this air passes over the element and through the clothes. The expelled air is very moist and at the first cold.
The Moist air may cause electrical components to fuse!
By using a vent kit to take the moist air outside and leave the warmth in, the efficiency of the dryer is improved and you save money!