| 摘要 |
A method of replacing air filters in a return duct that includes a housing mounted in the ceiling of a structure includes providing a cover having a plurality of air openings pivotally mounted to the housing and attached to a portion of the housing by magnets. A suitable tool can be manually attached to the cover so that the cover can be rotated downwardly and the used air filter removed and replaced by a new filter. The cover can then be rotated into a closed position and held in place by the magnets. |
