HPA304 (Allergen Plus)

Honeywell is an old and established brand. (My smart thermostat is actually a Honeywell and it’s a great performer.) Anyway, I bought a Honeywell HPA 304 extra large room purifier in late 2024 after my mom had her 2 for over a year and liked them. But until that point, I was a snob for DIY CR boxes. So not only did I have my mom‘s experience, there used to be a chart circulating on Twitter comparing the performances, loudness levels, and value of various air purifiers and that model of Honeywell compared favorably.  It also helped that there was a fantastic sale  at the time. It can be an energy hog at the high fan speed though (ie also its loudest setting), and I think people just go for the better  looking purifier if given a choice. 

We have a 2 story house and on the main floor we’ve been through 3 high priced super duper fancy ones since 2020. They stop running, start making noise, we can’t find filters, it’s always something. Upstairs we have an inexpensive old fashioned black box (Allergen Plus) from Honeywell that just won’t quit. Get the ugly one from Honeywell.

Sufferer of lots of allergies, including dust mites here! My allergy dr recommended a few things: mission allergy brand pillow encasements (this brand only- apparently other ones don’t work as well) https://www.missionallergy.com/product/barrier-2-pillow-encasings; wash your sheets, blankets, mattress covers in HOT water; use an air purifier. We’ve used Honeywell Allergen Plus HEPA air purifier for years now and it helps a ton. It’s not the quietest, but it’s a nice white noise while we all sleep.

Honeywell we use the big 500 sq foot one for main floor and the smaller 200 sq ft one for the bedroom leave them on low change filters every 4/6 months

I have two Honeywell large room air filters. They are sub $200. The filters are readily available. I blow them out with an air compressor outside and reuse them until I can’t. I run them on low 24/7 and they have a turbo setting. They come in white or black. HPA 300 series Unless you want those electronic ones that have some dubious science imo. They are pretty much alll the same except for the filtered air per minute, filters, and number of pleats. The more pleats the less you need to change filters.