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"Due to the sophisticated and technical condition of the equipment used to clean air ducts, it is not recommended that homeowners attempt to clean them themselves. Our NADCA-trained technicians have the right knowledge and tools to complete the job efficiently and safely, offering the peace of mind of a job done right. However, there are some things you can do in the meantime in order to maintain them, such as checking your air filter monthly and replacing it as necessary."
<https://www.powervacofottawa.ca/duct-cleaning/>