You can clean air ducts and vents in a house by vacuuming them with a powerful vacuum cleaner, or by using a brush to clean them. It's also important to clean the registers and grilles in the house, as these can become clogged with dust and dirt.

There are a few options for cleaning air ducts and vents in a house. One is to use a vacuum cleaner with a special attachment to remove the dust and debris from the ducts. Another option is to purchase or rent a rotary brush machine that can be inserted into the ducts to dislodge the dirt and debris. Finally, you can also have the ducts professionally cleaned by a company that specializes in this service.