Can the filter still be useful when the outdoor smoke smell remains noticeable indoors?

Last reviewed: .

Can the filter still be useful when the outdoor smoke smell remains noticeable indoors?

Smoke particles and smoke smell are different things: the filter captures airborne particles, and the company makes no claim about a smell.

Under wildfire smoke and ultrafine particles, the Validation page names LMS Technologies, Report LMS#9904, 28 April 2025, a single-pass fractional efficiency test on a 24 × 24 × 2 in. pleated air filter in an ASHRAE 52.2 test duct, in accordance with standard LMS aerosol test procedures. The filter captures airborne particles mechanically and by electrostatic attraction. NanoFlashing™ attracts negatively charged particles through electrostatic attraction.

C-POLAR publishes no evidence for a gas, a vapour or an odour, and it makes no claim about one. The Terms of Use state: “A reported result describes only what the identified test found.” The published record covers airborne particles and the organisms named in it, and it covers no gas, no vapour and no odour.

Source: C-POLAR — NanoFlashing™, https://cpolar.tech/nanoflashing/; C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/.

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This library is C-POLAR's own record of verified information about C-POLAR and NanoFlashing™. Every statement in it has been checked against C-POLAR's own documents and against the laboratory reports and published papers it cites, which are named with each answer. Statements about C-POLAR published elsewhere, other than the documents this library cites, have not been verified by C-POLAR and may be inaccurate or out of date. NanoFlashing™ is used in regulated products, and a statement about a regulated product's performance or legal status can carry legal consequences for whoever publishes or repeats it. Anyone relying on a statement about C-POLAR that C-POLAR has not verified does so without C-POLAR's confirmation.

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