| 摘要 |
The present invention entails a kit having comprised of a filter frame, at least one replaceable filter sheet, and fasteners for attaching the filter frame to an air return duct. The filter frame includes an air inlet side that includes a series of spot fasteners formed on the air inlet side wherein the fasteners serve to attach the filter sheet to the air inlet side of the filter frame. The filter sheet can be easily detached from the air inlet side of the filter frame and replaced by a fresh or new filter sheet.
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