This is exactly what I was looking for a quiet and reliable air purifier. One of my kitties has so many problems with the air pollution and since I bought these air purifiers (I bought two) she stopped coughing.

Great product, i now own two of these. We live in an environment that can be quite dusty at times. And we have noticed a marked improvement in air quality. Very easy setup and directions.

I purchased this a few weeks ago. It's bigger then I thought it would be. I have it on low it's quiet and is either reading 99 or 100. It's still early I hoping the dust will be far less then I have now.

I just bought it yesterday. For my baby , the air of the Shark neverchange air purifier is very Fesh they have smell very lear , especially we don't need to change the filter until 5 years. I love it so much .

Not even 3 months and filter needs replaced.  My Shark Never change air purity did not work as advertised.  It has been less than 3 months and it quit filter and needed a new filter.

Ship time was amazing does exactly as it says it would do is super silent efficient and definitely cleans the air for me! I'm going through a severe allergen problem currently and having to turn my house upside down and this purifier has been my best friend through all of it:)

Purchased 2. I originally placed one upstairs and one downstairs living area. However they both were reading at 60%. So I placed both downstairs which is approximately 1200sqft ( which one purifier should work for) opposite ends of the house. One in kitchen one in living room. One is constantly at 70% and the other 64%. It has not reached 100% one time in 24 hours. On auto mode running at max. I don't know if I got defective ones or what is going on but this is a giant waste of money. I have one small dog. I cooked bacon last night around 7pm and I can still smell the lingering smell so this purifier did absolutely nothing. And my allergies are still off the charts even with both units running on the same floor. I have auto immune diseases and immune compromised and so is my young son. Having purifiers that work is essential for our well being. I was enticed with the never change filter with hopes of saving some money on filter replacements of our previous purifiers.

This sensor did nothing when I sprayed cleaner or air freshener near it. Still showed 199 percent clean air. It did react to blowing smoke into it. The air freshener pack smell is not noticeable unless I have my nose right at it. I'm not sure it works well as animal smells are not cleaned. The carbon should be cleaning animal smells. My blue air one removes odors whereas this shark one doesn't seem to. I do like the size and quietness of it. My house is less than 1400 sq ft so it should be cleaning my whole house but it doesn't seem to be fresh even though the air quality shows 100 percent.

We've tried a few different brands including Oreck and Blueair. This Shark outdoes all of the other models/brands we tried by a longshot. We have two cats, it contains any litterbox smell including the dust from the litter. Post-cooking smells disappear within hours, even strong smells from frying bacon. I would absolutely recommend this purifier over other options.

I got this a few weeks ago to help with issues we have with some smoke from our pellet stove on startup or if food gets over cooked to preclude the smoke alarms going off.. It seems to be ok but we still have a smell so it doesnt get all smells out of air.. Maybe it will work better with allergens or pet hair but for smoke smells of pretty much any type its not that great to us.We cant use automatic because it never speeds up enough to do any good. It always seems to show good air quality, so we have to use manual 95% of the time. So by using manual on higher speeds, we will have to replace the filter far sooner than claimed on videos or manuals. Be aware of that.