Maintaining Vent Cover Cleanliness Clean supply and return vent covers are critical for keeping your home’s air clean and making your house’s HVAC system run as efficient as possible. It is wise to keep your HVAC system running right and keeping your home’s air clean as possible, to clean your system duct work and vents annually. Cleaning your system’s duct work and vents will run you from $275 to $375 dollars. For bigger systems the cost will be more. Cleaning […]