Winix HR900, Ultimate Pet 5 Stage True HEPA Filtration Air Purifier, 300 Sq. Ft, White

Just had the popcorn ceiling removed and it left dust on everything, everywhere. Not sure if that's the cause, but have been having hives on face. After my mother saying maybe I should get an air purifier, I saw one at my hair salon and looked into the one my stylist had. After the deep dive into air purifiers reasonably priced on the market, came up with this one instead based on mutiple reviews from Amazon and elsewhere. they also sell a smaller unit for smaller spaces, and another unit like this one without the pet filter for those watching their dollars. I have not installed the pet filter yet, but will when move to my mother's where there is a cat and it's an old musty house, and will update review. Right now, I'm using it in a 1000 sq ft condo. I've kept it in the middle of the open space dining/living room and have it running all the time for the past week. I know it is working/responding because it is usually in low or sleep mode with the blue light, but when I cook, shower, open a door or window it revs up to medium/yellow light and rarely high/red. As i've been cleaning popcorn dust areas, it also notices and ups it's filtering. I have it in auto mode so usually hardly notice when it's on in low mode or sleep mode. The noise level at the higher modes is fine, not super loud or annoying and I am pretty noise sensitive. The best unexpected benefit is even though it's not in my bedroom, I'm not waking up stuffy and coughing which is my norm (sucks to be me then!) That is sort of miraculous, so I can only assume that since I have it on continuously, it is cleaning the air throughout the condo as I haven't changed anything else, nor in my diet. It is a fairly large unit, though not too heavy to move from room to room as I've done once. When I had it in my bedroom one night, I put it in Sleep mode and noise is nothing, the only light is the "Sleep" mode light (I'm also very light sensitve, of course!), so I put a small piece of cardboard over it, just resting on it, and that took care of the light. I didn't notice any affects from having it in my bedroom early on, moved it back out to the living area ever since and that's why I'm so surprised it seems to help the whole place even in other rooms after being continuously on for days. I've also tried the PlasmaWave feature which is supposed to help it filter better, and there has been discussion on the internet about any detrimental effects of ions, with Winix and others explaining that this type doesn't produce the detrimental ions. At this point, I haven't noticed any difference negatively from having it on, but it is easy to turn it off if you have concerns. I am very pleased and think for the price and benefits it's more than worth it!

Folks, I’ve had Germ Guardian tower purifiers for years, and although I have no complaints about them (other than being a bit loud above low), this Winix is truly the bomb. Without getting into the details of WHY, I recently had to add a kitty litter box to a very public part of my house. I quickly realized how horribly scoopable litter dust settled on EVERYTHING in the vicinity—it was awful. I noticed that this purifier would go into ‘red mode’ a few minutes after a cat would go, after I would scoop, etc. It was located about ten feet from the litter box.Well, I shifted everything so that this unit could sit right next to the litter box, and IMMEDIATELY saw the difference. It would begin filtering dust immediately, going into ‘red mode,’ and then into yellow as the dust dissipated, then finally back to blue. The amount of dust on the surrounding furniture has reduced by at least 90% as a result of putting this directly next to the litter box.The photos are of a month-soiled, disposable, outermost “paper” pet filter, compared to a new one. The filtration of the three pre-filters before the air even gets to the pleated HEPA filter is impressive. I change the first one monthly, rinse the second, and vacuum the third (rinsed it once after six-months of use). I would recommend this unit to anyone with allergies (pets or not), with pets, next to litter boxes (the closer, the better).One note re: Mode settings: I have been leaning mine on ‘Medium’ 24/7. In auto, the fan runs on low, and only kicks into high when the sensor detects dust, food ‘fumes’, etc., and went into ‘’Sleep mode” in the dark. I personally want it picking up on any and all dust from that litter box, and decided auto didn’t suit that need. It’s all a matter of personal need and preference when choosing which mode best suits you.

It's large so effective in big rooms. It's sensitive and uses a large but discrete light to show when air is less than optimal. Ours goes from blue (good aq) to yellow when the cat walks by it or uses the litter box. We have found that ours doubles as a pleasant nightlight. I find it amazing and I've had no sore throat since we set it up 5 days ago. I can't believe the difference already. I purchased two as I live in a two-story farm home. I have foster critters galore. It is amazingly quiet!! I do not use the sleep mode as I prefer a little soft brown noise at night. It's just...so quiet!! I'm as surprised at that as I am how effective it is.Most importantly, we experienced the horrid wildfires in Oregon this September and I was using the homemade box fan filtering set up at first in a pinch. Air quality was off the chart as you would expect. It's been 7 weeks since the fire hit. We've struggled with odd respiratory/throat and a random sharp dry cough since. These symptoms no longer exist when I'm at home. But do at work which tells me these machines are doing something remarkable. I would highly recommend spending the $$ on these. It's well worth it to us so far. Amazing really. I do use the first thin pet filter *which they include 12 of these inside the box when shipped*. There are a total of 4 different types of filters in the machine once you set it up, which is EASY. All included to get you through the first two or three months at least. Two are washable (1-semi think carbon, 1-thin nylon{?} mesh), the paper filter is thick and very effective and will need to be replaced but it says they can last up to 12 months which mine will obviously not do. I'll update the post when it. needs changed. Finally, The paper thin fibrous filter for pet hair/dander filter which as stated above, comes with 12 of these and I'm sure I will go through these fast. No matter. It's totally worth it so far! Just checked filter two that is in the busiest part of the house. ALL filters still look like new almost a week later. YaY! These also have a 'dust' sensor which is nice.