Dryer Vent Cleaning is becoming a large industry as a result of dryer vent fires being the number one cause of house fires in the United States. Clogs in dryer vents can root from many causes including dryer lint, rodent and bird nests, smashed piping, and improper installation. Commercial dryer vents may need to be cleaned regularly under some local building codes in such industries as laudromats, heathcare facilities, hotels, senior housing and many more.