Duct cleaning has never been shown to actually prevent health problems. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space.

An air duct cleaning company will most likely charge around $90 to $125 per hour. Most jobs take between three and eight hours. Some contractors also charge per vent, with the average cost being around $25 to $50 per vent. Anything that increases the job's time or difficulty may incur extra fees.

Just like any other HVAC system, air ducts require regular maintenance to ensure maximum efficiency. As a general rule of thumb, the National Air Duct Cleaners Association (NADCA) recommends air duct cleaning every 3 to 5 years. With certain methods, that cleaning recommendation can be extended to 6 to 8 years.

At On Time Home Services, we recommend scheduling regular air duct cleaning services from a professional HVAC technician to keep your system in the best possible shape, but in between professional maintenance visits you can clean them yourself.