
Coway
Airmega AP-1512HH Mighty
Durable, effective for allergens/odors, but loud on high.
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Only buy levoit in black, the white turns yellow. Ask me how I know.
Portable hood by the window for capture. HEPA + big carbon purifier running high during + a few hours after. If money is tight: consider a DIY Corsi–Rosenthal box (for particles) + a smaller carbon purifier or the hood for odors. If money is not as tight and smoke is frequent: consider a smoke-focused purifier with heavy carbon (Winix 5510, Levoit large-room, Oransi TrueCarbon, Austin Air, etc.).
I think this gets overstated. The Core series pre-filter just comes with the filter. It’s not much harder to vacuum those than the separate ones in the flat panel units. I say this an owner of Cores, Vitals and an EverestAir.
i just got my levoit vital 100 today, anything more (200 or whatever) and it would be beyond what im willing to pay for. im based in singapore, so while doing research, never came across the other 2 brands. but for me it was either levoit core 100/200/300s/non-s or whatever? or xiaomi. based on research, parts are more or less from china? im not sure, cause levoit is apparently a brand from the states. rectangle is apparently better than round? you cant overkill it, so get something a little better than something that just meets the bare requirement (your room size), so that it is strong enough to not produce so much sound while maintaining efficiency. the vital series works better than core. but I see that vital is highlighting its capabilities in filtering pet related stuff, i have no pet, so it wasn't a deciding factor. so far, fan speed one is VERY silent, but I don't feel the effectiveness, like there isn't much air coming out from it? great while sleeping tho. 2 is noticeable, but like normal fan sound, not too loud, but you feel it. 3 & 4 is pretty loud, don't think i'll be using that setting unless there is some serious cigarette smell or haze. my room is really tiny <1000ft3, so for the past few hours of letting it run at fan speed 2, air in my room does feel okay. like, its defo working.
Simply do not buy WiFi-enabled purifiers. They track environment data. Get a dumb HEPA unit with manual controls. Coway or Levoit Core are proven options.
I have 3 Levoit Air Purifiers.... Love them. I have 2 of the Levoit Vital 100s and 1 Levoit Vital 200s. I prefer these because you can place against a wall without sacrificing it's functionality. They have square filters and tend to have more media surface; as compared to the Levoit Core series which are 360° filters. They also have a Levoit Everest Air... Which is the BIG DAWG. It's a bit pricey though. One day I'll probably bite the bullet and buy one of them.

Coway
Airmega AP-1512HH Mighty
Durable, effective for allergens/odors, but loud on high.

Levoit
Vital 200S-P
Smart, effective dust/odor; some find replacement filters pricey.

Winix
5500-2
Budget king, durable; poor VOC removal, Plasmawave disliked.

Coway
Airmega Mighty
Durable, great for allergies/dust, responsive auto-fan.

Winix
5510 & 5520
Good value, durable, effective for pets; carbon filter issues.

Ranked #1
IKEA - UPPÅTVIND

Ranked #1
CleanAirKits - Corsi-Rosenthal Box

Ranked #1
Austin Air - Healthmate Plus

Ranked #1
Winix - 5500-2

Ranked #1
Coway - Airmega 400

Ranked #1
Coway - Airmega AP-1512HH Mighty