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1 A proper home air duct cleaning costs anywhere from $400-$1,000, depending on the size of the system to be cleaned, the type of services offered, the regional climate and the level of use the ventilation system gets, the type of materials inside the ductwork and the amount of contaminants (dust, mold, etc.).
For example, Davidâs Chimney Cleaning Service in Springtown, Texas, offers the following prices per duct: 1  $25 per register/vent. 2  $35 per return. 3  $45 per indoor unit. â 4 $75 per outside unit as needed.