Could a rattling noise indicate an unsecured frame?

Could a rattling noise indicate an unsecured frame?

The label sets how the filter is fitted, and a noise or a leak in the system after a change is a matter for the system and the people who run it.

The NanoFlashing™ Air Filter label directs: “Check that the filter sits square in the track with no gap at the frame. Air that passes around a filter is not treated by it.” It also states: “Improper installation can reduce airflow or damage the equipment.” and “The frame edges can be sharp.” The filter and its frame are one article, and the label instructs that neither is cut, folded, trimmed, bent, punctured or altered.

The track, the clips and the housing that hold the filter are part of the equipment, and they come from the maker of that equipment. NanoFlashing™ is a technology; the name, rating and sale of a product that carries it are set by that product's maker and seller.

Source: NanoFlashing™ Air Filter label, Directions for Use and Caution.

Reviewed on 21 September 2026.