Chances exist that lint that has in fact been restricting the exhaust vent over a prolonged time period can cause overheating which in turn can cause a fire. The establish of lint that occurs over a prolonged amount of time is not merely a fire threat, it is also a clothing dryer problem that gradually steals the energy efficiency of the clothes dryer and gradually cost you significantly more money.
Q. Just bought an older house. When we turn on the whole house fan, even with lots of windows open, some air is still drawn through our vents. This causes severe alergy attacks for my wife. The previous owners never had the furnace serviced, weren't the cleanest people, and had several cats. I can only imagine how nast all of the air ducts are. I cleaned out a couple of the reurn ducts and they were nasty with dust and construction debris. I want to have the system cleaned out well. I've gotten several quotes that vary pretty greatly in cost $179-$450. We have a small home with a finished basement that also has heating ducts. I want to choose a service that will do a great job, but have heard that some do a much better job than others. How do I know what to look for, or ask for in a good air duct cleaning service?