I did a lot of research before deciding on my Shark Air Purifier. Keeping in mind reviews questioning whether it works or not, I was wary when my Shark had air quality 100% to 99% consistently. I decided to give it a couple of weeks anyway. I had my doors and windows open earlier today and noticed the percentage on my Shark was in the 80s. I checked the air quality for the day, and we had a poor air advisory alert for the day. Closed my doors and windows within an hour the air quality returned to 99% to 100%. So Yes, I do believe my Shark Air Purifier works. Being asthmatic, I usually check air quality if I'm going to be outside. I didn't realize how much it affected my air quality inside until my Shark kicked in and I could see the difference.

[This review was collected as part of a promotion.] I received this as gratis from influenster for free for my honest review. This thing tests the air quality and cleans the air based on that. We put it in the basement with the cats and it has been amazing for the air quality down there!! It went from 30% to 100% and runs quietly too! I would recommend this to anyone with allergies or poor air quality it definitely does the job! Easy to use!

[This review was collected as part of a promotion.] Awsome purifier. Works great keeps my living room feeling great. Great to know the air is good by looking at the numbers. I never have to change a filter. Easy to use and has a timer. I definitely recommend this great purifier. It works wonderful and is quite.

[This review was collected as part of a promotion.] I love this thing. The gauge on the front that shows what the quality of the air is at is amazing! It definitely works too because the moment we start cooking the number goes way down and the filter starts working on over time until it gets back to 100. Helps keep dust away, and I think it helps with our cat hair (but I'm not sure bc cat hair still turns up everywhere). Also love that I don't have to change the filter so I dont have to keep up with buying the filters. Worth the money!

Work great while they work. The "5 year never change" filters have to be cleaned and now after less than 6 months need to be replaced. I purchased 2 of these at the same time, and both of the filters are falling apart due to repeated (bi weekly) cleaning. Without being cleaning, the purifier says the room is 99% dirty and runs at full blast 24/7

After a few months our unit began to have a high pitch whistle. We clean the unit once a week and we're dumbfounded by why it was doing this. I took a lownpressure air nozzle to the entire unit and still it whistled. I wiped the accessible area with a microfiber towel, no change. I called SHARK and after they saw and hears, via video chat, the issue, they immediately sent a replacement. I hope this new one doesn't begin to whistle in the next few months. We love SHARK. They are amazing at replacing warrantied units. Always get a warranty, I've used for every SHARK unit we own.

I have had this air purifier for 1 week. Took all filter out to clean, however they were just a little dusty. I have an American Bully that is very active and sheds alot. I dust & vacuum every day. I'm gonna check it again next week. I think it smells fresher in our home from using it.

I love this machine! It's wasn't sure it is worked at first because it said my house was 100% for air quality. But then my husband started making bacon and it kicked on right away. 10 minutes later the house was clear and no hint of a bacon smell. 100% worth it and will probably get a smaller one for my bedroom.

[This review was collected as part of a promotion.] I received this product a while ago and put it in the corner of my living room. It was easy to assemble and runs so smoothly and quietly. The odor eliminator is a nice feature and the air feels noticeable better.

[This review was collected as part of a promotion.] I cannot believe we went years without one of these - the results are INSTANT. We live in the midwest. Basically a RED ZONE for all things related to air quality, pollen, pollution, etc. We also have dog, birds, cats. During the mornings, we like to open our windows to let some fresh air in but we also get the pollen. For years, I've had to have an inhaler as it affected my lungs. We tried the Shark NeverChange Air Purifier and what a wonderful piece of modern technology. Out of the box, it was ready to plug in. You also get the odor neutralizer (we have a home gym and that room gets rather muggy and smelly). We love the look, design, functionality, and the SILENCE of this thing. Even when it's fully powered. There's no distractions or attention drawn. It's beautifully sitting there in the corner doing serious work. I love the digital reader that shows you what your air quality is. We noticed how low our score would get after making breakfast, cutting the grass, or even running the vacuum cleaner. Rather than that air simply circulating with your ceiling fans, this purifier is recycling the air and you can feel the magic. The first night we ran this and then walked downstairs, it felt like a brand new atmosphere we were in due to the amazing air quality and smell. I haven't used my inhaler as I have had no breathing issues after we received this. That 'home smell' every home has is no longer present as the odor neutralizer makes your home / air smell quite amazing. I no longer have to apologize to my guests as we walk past the gym room as it normally smells just like a gym bag but it smells pleasant! This is a MUST HAVE piece of technology for anyone. Homes need these and your quality of life will appreciate you for it. We cannot recommend this enough!