Some companies in Orlando FL specialize in this, making it the only one they provide. This vacuum cleaner knocks out the ash from chimney flues, fireboxes and other smoke shelves. It should not be kinked or crushed, since this will also restrict the dryer's ability to vent properly and will cause the dryer to overheat. Clogged chimneys start fires and cause venting problems throughout the house. Service means being on time for your appointments.