Shark - Air Purifier 4 (HE402)
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Based on 1 year's data from Feb 24, 2026 How it works
Liked most:
3
3
"I’ve found the readings between them to be very consistent and accurate."
"I let the dogs out this morning and left the patio door open the air quality monitor dropped significantly and the air purifier kicked into high."
"7 of them have sensors built in, which change the color based on air quality."
2
0
"Every now and then it will turn itself off and I have to spray off the filters on the sides and then it goes right back to work."
"The filters are reusable and easy to clean"
6
0
"My husband and I went to bed with sore throats last night after running errands, no sore throats this morning."
"My college age son has allergies and always wakes up feeling crappy, he said he actually felt good this morning."
"It’s been kicking on a lot lately because it detects bacteria and viruses in the air. 🦠"
7
2
"Work great and the one in the basement really keeps the kitty litter smell to 0."
"I have 2 dogs and there’s a noticeable improvement in pet smell."
"Good for cigar smoke."
1
0
"It's nice and quiet."
Disliked most:
1
3
"Also I just put it in the bathroom w my bf while he poops. No change in the air reading or smell of the bathroom."
"Sensors read poor air quality all the time so the unit was running non stop."
"I bought a shark air purifier a few years ago and it was always at 100%"
3
2
"Also I just put it in the bathroom w my bf while he poops. No change in the air reading or smell of the bathroom."
"It does NOT like sauerkraut, burnt eggs or fried tortillas 😆"
"The light ring that indicates a change in air quality does change when I cook. I’m in an apartment. The unit is in my living room. But it takes a good 40 min to an hour to get back to 100 %. I would think that’s just the natural time of the air clearing. No help from the unit."
1
2
"I tried it and returned it. I wanted to use its auto mode. But it doesn't seem to ever turn on by itself. Since that's the primary reason I wanted that model, it just didn't work out."
"Sensors read poor air quality all the time so the unit was running non stop."
0
3
"Mine stopped working after 2 months."
"It advertises as lasting 5 years between changes, but I think that is inaccurate because each environment is different. I think mine will need yearly or bi-yearly changes."
"But no, it’s not actually never-change, you will eventually have to replace the hepa, I think they say 5 yrs but all depends on"
1
2
"It advertises as lasting 5 years between changes, but I think that is inaccurate because each environment is different. I think mine will need yearly or bi-yearly changes."
"But no, it’s not actually never-change, you will eventually have to replace the hepa, I think they say 5 yrs but all depends on"
ALrredditt 0.0I bought one. Not so sure it works. The light ring that indicates a change in air quality does change when I cook. I’m in an apartment. The unit is in my living room. But it takes a good 40 min to an hour to get back to 100 %. I would think that’s just the natural time of the air clearing. No help from the unit. 🤷🏻♀️ Also I just put it in the bathroom w my bf while he poops. No change in the air reading or smell of the bathroom. After this test I am returning.
amphetaminesfailure 0.0I have two Shark ones too, I'm happy with them. One is also near my cat's litter box, mainly because I'm super paranoid about my house smelling for guests. I've visited too many homes over the years that look clean, but are definitely smelly. I know when you're the one living there, you don't even notice it. Just a recommendation as a fellow cat owner though, I switched to pine pellets a year and a half ago and there is almost NO smell from the litter box, it really absorbs the urine. Added bonus there's no dust like with clay ones (I don't trust the even the ones that claim they are "dust free". I use this brand: https://www.petco.com/shop/en/petcostore/product/feline-pine-cat-litter?srsltid=AfmBOorIHcL_YhTcQId9bj7qgmBmG-vFBd88---gl8sP_gKCQjoiPhx_ A 40 pound bag lasts me around 3.5 months with one cat.
B00k_Worm1979 0.0I have one and I love it! I have two sick people in my house with a cold. It’s been kicking on a lot lately because it detects bacteria and viruses in the air. 🦠
I just bought a Shark air purifier and it’s near the kitchen. No more food smells lingering in the kitchen. It does NOT like sauerkraut, burnt eggs or fried tortillas 😆
Bad-Luck1313 0.0Clears the air way faster and better than my Dyson. It’s a workhorse.
Calm_Breadfruit_4834 0.0I’ve got a shark one and I’m still not converted if they work .
Celticlady47 0.0I've had 2 Levoit air purifiers and recently bought the new Shark Ninja one that doesn't require filters. They are all awesome at helping me breathe and keeps the dust and cat hair under control.
cHefMyco 0.0Shark air purifiers work pretty well
Competitive_Bat4000 0.0there are 2 filter, it has pre-filters on the outside that can be washed and inside is a typical air filter cartridge. The idea is the outer pre-filters catch most the debris and can be washed off, saving the inner hepa. But no, it’s not actually never-change, you will eventually have to replace the hepa, I think they say 5 yrs but all depends on
daskalakis726 0.0We have 2 dogs (standard poodles so we don't have dog hair issue) and we just got the Shark Air purifier thing for Christmas. I feel like it was pointless. Our air quality is always 99-100% (which is good, yay) but I feel like it's lying LOL. The ONLY time it says our air quality is bad, is when we are cooking. It'll go down to the 40s sometimes!
ImportantCandidate12 0.0I have this model. It advertises as lasting 5 years between changes, but I think that is inaccurate because each environment is different. I think mine will need yearly or bi-yearly changes.
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