Honeywell - True HEPA Tower Air Purifier with Allergen Remover - HPA160

I've had a Honeywell HPA060 in the room with the liter box since 2013. It's still going! I also have the larger version HPA 160 in each bedroom to help with allergies. When the wildfire smoke summer came to the region, our indoor air quality was still fine while it turned yellow outside. It basically only has 3 fan speeds, a true HEPA filter and a carbon filter. Option to buy carbon prefilter with added zeolite for more odor absorption. I should mention that as a former pet sitter, getting an air purifier to handle litter box odor rarely works. The amount of odor causing material that renews the smell basically overpowers any air purifier's capacity to absorb it, especially with ammonia. What's happening is that even after you clean it, little particles break off and build up in the box over time. They continue to give off odors even if there are not clumps in the box. So, the best way to keep the smell down on top of scooping is to completely change and wash the litter box about once a week and have the box in a well ventilated room. The smell can also be more pronounced in small spaces where the air doesn't change over much, like in a laundry room or closed bathroom. Putting an air purifier in a room like that basically just recycles the stinky air in the room because it's already absorbed as much as it can. Air purifiers do, however, keep down litter dust, which can carry the odor through your house. Clay litters make a lot of dust, but are better at trapping odors. Silica crystal litters tend to stay put as far as dust goes, but they don't do much for the smell. Corn, newspaper, and walnut type litters are the worst for smell and should be completely changed every 2-3 days. No litter or air purifier can cover up the smell from an uncovered poop. Some cats just won't bury their doodies. I use Feline Pine. I was skeptical at first, but the rescues near me use it, which convinced me. It smells like a fresh forest when you first put it down. It's easy enough to scoop. It does make some dust when you pour it out fresh, but when the cats are in the box it doesn't make a lot of dust or track through the house on their paws. It's also very absorbent and neutralizes pee smells. Just like any other litter, it'll need to be completely changed every now and then. One last trick of the trade -- get a blacklight flashlight. Shine it on the walls and floor around the litter box to see if any pee particles sprinkled when they tinkled.

Anything with plasma, airwave, ozone etc is toxic. You have to research each model. I have a basic HEPA Honeywell because of this.

I love the ugly-ass Honeywell tower one i have. You can get washable filters too, which is a nice money saver. It's relatively quiet and powerful. Everyone should make at least one Corsi-Rosenthal box though because they are super effective!

Honeywell tower is a must!

I have a huge Honeywell tower that I loved for my old studio apartment, but now that I’m in a large house I honestly think corsi-Rosenthal is the best bang for your buck. They’re incredibly effective, cheap, good for large spaces, and customizable.

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.

Yes, an air purifier helps. The best brand is Honeywell with a HEPA filter. Second is Bionaire with True HEPA filter (purple one), third is Bionaire with the blue filter. Levoit kind of sucks. Don't waste your money on the Pure Enrichment Personal Air Purifier.

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

For reasonable VOC removal there are only 4 players I know in the market which offer products which have the minimum 10 pounds of sorbent media: Airpura, Allerair, Austin, IQAir. Wildfires product a huge mix of chemicals - from the vegetation, contents of burned buildings, etc. There is no consumer solution that removes all VOCs. Each type of media is better at some chemicals, not so good or not effective at all with others. For the same reason there is no sensor that I know that will give you the level of all VOCs. These machines and filters tend to be expensive. I just upgraded my Austin units with Immunity Machine filters which cost \~$700 each. We were spared wildfire smoke this season but with AQI numbers breaking 100 I was able to keep my indoor values close to 0. I use Austin and IQAir VOC machines along with Honeywell and Whirlpool HEPA units, 3 filters per room.

Honeywell HEPA. Don't buy an electrostatic/ionizer type "purifier" as it creates O³ (ozone) - which is hazardous (and is also a component of smog).