Airmega 250

I have 3x Coway AirMega 250 units (one in each bedroom) and have not had any chemical smell issues at all FWIW. I’m guessing it can depend on the people, as some are more sensitive to certain smells than others.

I have a coway AP-1512 for my bedroom or similarly sized rooms and it works great. It has a double pre-filter that removes hair and odors as well as a thick sturdy hepa filter that seems to collect a lot of particles over time. It is relatively quiet vs other air filters and also very powerful (i.e.

Funnily enough, all 3 brands are about the same loudness. And all 3 perform around the same, as the top 3 in recent testing. It really comes down to preference, whatever special features you like (if any) and even aesthetics/design. I love Levoits myself because they are simple, but affordable and v

IQ Air is one of the best as the Health Pro Plus Xe I think does a good 300ish CFM while also having I think 15 pounds carbon pellets + related to absorb odors/VOCs/smoke etc. Although if your allergies are purely particulate based you can get 400CFM of particulate coverage for like 90 bucks with a

AirMega 150 is undersized for your situation. I personally prefer powerful units even for small rooms, they filter quickly and keep noise low. An undersized purifier will either run constantly on high or fail to keep up. The 150 will work, but expect louder operation and faster filter wear. You migh

Ozone is well removed by chemically untreated activated carbon. The HealthMate Plus has potassium iodide (KI) impregnated carbon and zeolite. For something like NO₂, I would try to confirm with someone more familiar with chemistry as to the exact mechanisms of capture/action and possible products of