Topic
7 guides.
Filter-only purifiers do not make ozone. Ozone generators are designed to, and some ionizers and other electronic purifiers make it as a byproduct. Here is how to tell which is which.
For asthma, how a purifier cleans matters as much as how fast. We chose filter-only models listed as mechanical by California, sized to the room, with an option for smoke and odor gases.
The 200M is the version of Coway's Mighty that drops the ionizer. Same filters, same cheap yearly filter set, three manual speeds, and a sensor-driven Auto Mode.
UV-C lamps aimed at the cooling coil keep mold and bacteria off it; that is what they do well. For cleaning the air you breathe, EPA says a typical home unit's dose is too low. Use them with a filter, not instead of one.
"Electrostatic" covers three different things: disposable pleated filters with charged fibers, washable MERV 8 panels, and powered electronic air cleaners. They perform very differently.
Most air purifier mistakes come from the box: a coverage number that assumes one air change an hour, a filter name that means little, and running costs nobody mentions. Here is the checklist we use.
Ionizers charge particles so they stick to surfaces or clump. They can also make ozone and other byproducts, and the evidence for some newer ion technologies is thin. Here is what is known.
