Your home has a network of ducts inside its walls and beneath its floors that connect to and from your central A/C and heating system. It is your responsibility to clean the ducts on a regular basis to prevent them from being clogged with debris, dust, and other contaminants that filter through the air. It's not something that needs to be done all the time, but when the time comes to have your system cleaned out, you may be concerned about the cost of air duct cleaning.Fortunately, on the scale of house improvements and repairs, air duct cleaning is relatively inexpensive. You should anticipate to pay between $400 and $600 for an average-sized air duct cleaning procedure. A high-end estimate of $800 accounts for larger, more complex operations. If your property has two or more air conditioning systems (which will cost around $1500), you may expect to pay a bit more than average, and a little less if you have a tiny home or condo.