A cheap charcoal air filter can reduce nitrogen dioxide (NO2) inside vehicles by as much as 90%, compared to levels outside the vehicle. Share: Facebook Twitter Pinterest LinkedIN Email.

Grease filters can easily be cleaned with a soapy bath and scrub of a sponge. Charcoal filters, on the other hand, need to be replaced every 6 months or so instead of a clean.

In a report by WM Air, the West Midlands Air Quality Improvement Programme at the University of Birmingham, the research team demonstrated that charcoal filters, which typically cost around £10-£20, ...

The charcoal filter works to absorb unwanted odors in the air while you’re cooking. Most over-the-range models actually have two filters: a charcoal filter and a grease filter.

A cheap charcoal air filter can reduce nitrogen dioxide (NO2) inside vehicles by as much as 90%, compared to levels outside the vehicle.