Honeywell - HPA300

This Honeywell HPA300 is a beast for allergies. It has an insanely high Clean Air Delivery Rate (CADR), which means it clears out dust, pollen, and pet dander super fast. I’ve used it in my living room, and it noticeably reduced my sneezing and stuffy nose during allergy season. It’s straightforward—no fancy features—but it gets the job done effectively.

I’d go with the Honeywell HPA300. It’s got a true HEPA filter and works really well against smoke, dust, and allergens. It won’t cover 2800 sq. ft. in one go, but for larger rooms (around 465 sq. ft.), it’s a solid performer. If you’re dealing with a big space, using multiple units could be a good workaround. If you want something that covers more area in one unit, you might want to check out Medify MA-112, but it’s a bit pricier. Just depends on how you want to set things up. Hope that helps! check reddit thread: [https://www.reddit.com/r/ProductsDiscussion/comments/1jifddb/top\_4\_air\_purifiers\_to\_breathe\_clean\_in\_2025/](https://www.reddit.com/r/ProductsDiscussion/comments/1jifddb/top_4_air_purifiers_to_breathe_clean_in_2025/)

In addition to Medify, which someone else mentioned, I have liked my Honeywell HPA series. I have the 100 and 300 in differently sized rooms.

Also check the clean air delivery rate (CADR). I used this site to search for what was good - https://ahamverifide.org/ahams-air-filtration-standards/ I went with a bunch of Honeywell HPA300 machines to cover multiple rooms several years ago and have been thrilled. They run 24/7 every day on low but that turbo speed for about an hour helps move the air through the room faster on highest pollen days. Turbo speed sound is not quiet at all, but the low setting is very quiet. 

+1 to the HPA300. I have 4 of them - 1 in each bedroom, 1 in entryway/dining, 1 in living room - all running for ... 7-8? years solid, 24/7. They are absolute powerhouses. 

For general allergies like dust, I’ve had my Honeywell HPA300 for 4 years and it’s great and I feel and smell the difference. Unfortunately, I have neighbours that smoke and spray icky stuff and it’s not sufficient to get rid of that particularly if they’re actively still doing it. The original filters particularly the carbon were amazing, but buying the original filters because so great. I got generic filters and it seems okay.

Have Honeywell’s HPA8350 or HPA8300 in every room of the house except bathrooms. https://a.co/d/i2Iqqma

Have Honeywell’s HPA8350 or HPA8300 in every room of the house except bathrooms. https://a.co/d/i2Iqqma

I’ve got a Honeywell too, it’s the 300 series so pretty big. Yes the filters are expensive. I order the filters on Amazon though which saves a bit. My husband has terrible dust allergies and he noticed a difference right away. We live in a one bedroom. I will add I don’t usually run it in the summer when we have our AC cause the AC uses a lot of power.

I use the large room honeywell air purifiers. The one I have now has been running 24/7 for the last 5 years or so and is still trucking along. I use it because my wife and son smoke weed and smoke bothers me. It does a good job getting rid of the smoke and the amount of crap that is on the filter is amazing. I pretty much never have to dust.

I live in a tall loft with ciment ceilings and it produces a lot of dust. I got a large Honeywell HEPA air purifier and it works very well. The carbon pre-filter can be vacuumed and there is a thick layer of hair and dust every week. The inner filters I vacuum every month and change them once a year.

Honeywell Hepa Air Purifier is amazing all the time especially post fire. It's saved me.

Honeywell HEPA air purifier, over a 100 bucks but had been running beautifully for theblast 6 years. Filters are expensive though, but as a lady with asthma better be safe

Honeywell HEPA is what I’ve used for decades. Reliable and easy to find their filters.

Just stay away from the Honeywell HPA models. They all develop a burning smell. I've swapped my 2 out a total of 6 times.