Winix - 9800

That's a large area and you will need at least two air purifiers unless you are willing to spend. Even two Winix 9800s or the C909 (cheaper Costo cousin) would need to be run on high for adequate filtration. Running air purifiers on their highest speed is noisy. Having said that, I think bipolar ionizers like the Plasmawave in most Winix air purifiers will help destroy mold, but they will only help with mold that the air purifier captures (or possibly in very close proximity). Hepa filters will trap mold, but I think mold can grow on some filters in humid environmnets (why I would avoid air purifiers with built in humidifiers). Your best bet with mold is to destroy it at the source. I would check out the Wiki pages provided by the mods here. They have buying guides that will help you select the right air purifier for your needs. You can find it in the "about" section.

I was given a Winix 9800 as a bonus for buying solar panels through Costco. It seems to work just fine, and I can view an air quality chart on my phone for my living room. I know it actually works, because if I fart near the air filter, I get an "air quality alert" message on my phone. I'm not kidding.

the Winix 9800 works great.

I love my Winix. Quiet and effective. Also great for smells and smoke. I have large one in the main room and smaller ones in the bedrooms.

Mine has no specific setting for smoke. I have both the larger model with plazmawave (zero idea if that makes any difference) and the smaller models without that added feature. They all will filter outdoor smoke, including wildfire, quickly.

I prefer winix products, they do there job , nothing fancy

Yes, they really work. You only have to run it for a week and check the washable filter to know it works. We have winix and levoit, both are relatively inexpensive and pull a ton of crap out of the air.

I have a Winix that we use in the common areas. I like that it has HEPA filtration because my husband has emphysema. I can't say that it helps a great deal with dust though. I think my unit was $300-$400.

I have two Winx filters and they work really well but after 3 years or so the motors start making a ticking sound. I contacted the manufacturer who is not willing to sell me a motor and suggested I just buy a whole new units...

Winix Plasma Wave is an affordable effective unit. I used three when I lived in a polluted area. I now use it sporadically to clean up the plastic dust and other crap that accumulates in a home

I’ve been really impressed by my Winix. I have a huge one that really seems to do the job. I change the filter once the year but vacuum it all out more often than that to keep it running really well.

I’ve been using my Winix with Plasmawave since 2019 without issue, and that includes moving about once per year. These units have held up to that. I can tell you they really work. I have a mold allergy, and mold is literally everywhere in outdoor or indoor air with spores just waiting to land in a suitable environment for growth, but I have no symptoms at home with my two small Winix. I also have pets. These reduce any odors from that, and they are at what one might consider end of life for a typical air filter system. 5 years is typical. 10 is incredible. I am not washing the pre-filter nearly as often as I should and am slow to replace the carbon and HEPA filters sometimes, so 5+ is just astounding in my case.

The PlasmaWave I looked at used an ionizer which is a huge no for me.

PlasmaWave is just a glorified ionizer. I personally cannot stand the scent of ionizers, it gives me headaches.

I have 2 Winix HEPAs that have been running 24/7 for 6+ years. I clean the screen every week or so, replace the carbon every month, and the HEPA every ~8 months.