Does the finished assembly need inspection for gaps around its entire perimeter?

Does the finished assembly need inspection for gaps around its entire perimeter?

C-POLAR publishes no inspection method for an assembly; the label directs that the filter sits square in the track with no gap at the frame.

A converting process is qualified by the converter that runs it, on the material as it is delivered.

The Terms of Use state: “A prospective partner or manufacturer must perform its own testing, validation, compatibility work, safety review, risk review, and quality controls for its proposed product and use.” They also state: “A test of C-POLAR material, a component, or a prototype does not establish the performance of a finished product that incorporates it. Construction, processing, storage, wear, cleaning, other components, and actual use may change the result.”

What the company states about the material itself is a measurement. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, sections 3 and 5, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, NF Technical Products Inc., sections 2.2 and 2.3; NanoFlashing™ Air Filter label.

Reviewed on 21 September 2026.