http://www.totalductcleaning.com/Here_is_why_you_need_Interior_Dryer_and_Vent_Cleaning.html
The air is released through the exhaust system at the same time. The whole process is limited to ensure the flow of air and is thus more difficult to get drier air is completely removed. At the same time, the engine can easily get overheated and may terminate the initiation of a dryer fire. (more…)