Are folds and creases treated as cosmetic defects or functional defects?

Are folds and creases treated as cosmetic defects or functional defects?

What counts as a defect is set by the specification in the agreement that governs the delivery, and C-POLAR publishes no defect classification.

Every commercial NanoFlashing™ product is made by a manufacturing partner, in their facility, in their format. Development runs configuration by configuration, and each partner controls what is said about the work. The manufacturer and seller of a finished product are responsible for its design, manufacture, labeling, instructions, claims, sale, and warranty, except for a responsibility C-POLAR expressly accepts in a Separate Agreement.

The company's own check on the material is a measurement rather than an appearance. The polarity is a positive electric charge at rest. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request. The label instructs: “Do not install a filter whose media is torn, crushed, wet or visibly damaged.”

Source: C-POLAR — About, https://cpolar.tech/about/; C-POLAR — Terms of Use, section 6, 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.