KNKA Air Purifier for Home Bedroom Large Room Up to 1,695 Ft² in 1 Hr, HEPA Air Cleaner with Washable Pre-Filter, AHAM VERIFIDE, AQI Display, ECO Mode, Pet Mode for Pets, Dust, Pollen, APH4000
Condition: New
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Availability:
Only 10 left in stock, order soon!
Arrives
Tuesday, May 26
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Color: White
Features
- AHAM Verified & High CADR Value: Certified by the Association of Home Appliance Manufacturers, this air purifier provides reliable performance with a Smoke/Dust/PM2.5 CADR of 226 CFM (384 m3/h) and a Pollen CADR of 244 CFM (415 m3/h). AHAM certification guarantees effective, high-speed air purification for your home.
- Efficient Airflow Design: Engineered with dual front-and-back air intakes and dual side outlets, this purifier maximizes circulation for faster air exchange. It refreshes the air 4.8 times per hour in rooms up to 350 ft2, reaching up to 80% purification efficiency, while still delivering 1 full air refresh per hour in larger spaces up to 1695 ft2 with about 45% efficiency, helping maintain cleaner, fresher air throughout your home.
- Dual Filters & 3-Stage Design: Equipped with dual front-and-back cartridges, each featuring a three-stage filtration system: a washable pre-filter for larger particles, a True HEPA filter, and an activated carbon filter. 3-in-1 filter system traps everything from pet hair to microscopic particles, ensuring thorough purification. (Please remove the filters plastic packaging before installation.)
- PET & ECO Modes: PET Mode increases airflow to tackle pet hair, dander, and odors, refreshing the air in just 30 minutes. ECO Mode saves energy and extends filter lifespan by entering standby when air quality is excellent, then restarting automatically when purification is required.
- Multiple Modes & Fan Speeds: Includes Sleep Mode with noise levels as low as 22-24 dB for ultra-quiet nights, Auto Mode for effortless adjustments, and four fan speeds for personalized comfort. Select the setting that suits your needs any time of day.
- Real-Time Air Quality Display: A built-in sensor monitors indoor air and displays the AQI in real time. Color-coded lights make it easy to check your air quality in an instant.
Product Dimensions : 8.15 x 12.36 x 17.09 inches; 9.68 Pounds
Item model number : APH4000
Date First Available : August 22, 2025
Manufacturer : KNKA
Best Sellers Rank: #902 in Home & Kitchen (See Top 100 in Home & Kitchen) #6 in HEPA Filter Air Purifiers
#6 in HEPA Filter Air Purifiers:
Customer Reviews: 4.8 4.8 out of 5 stars (2,096)
Power Source: ac_dc
Control Method: Touch
Filter Type: HEPA
Floor Area: 350 Square Feet
Noise Level: 22 Decibels
Particle Retention Size: 0.3 Micrometer
Controller Type: Hand Control
Wattage: 45 watts
Contaminant Filtration Capability: Cigarette Smoke, Dust, Odors, Pet Dander, Pet Hair, Pollen, Volatile Organic Compounds (VOCs), Wildfire Smoke
Special Features: AQI Display, Dual 3-Stage Filters, PET & ECO & AUTO & SLEEP Mode, Washable Pre-Filter
Filter Class: HEPA
Brand Name: KNKA
Model Number: APH4000
UPC: 769016330562
Manufacture Year: 2025
Manufacturer: KNKA
Warranty Description: 2-Year Warranty
Part Number: APH4000
Included Components: 1 x Air Purifier, 2 x 3-Stage Original Filter (Pre-Installed), 1 x User Manual
Item Type Name: APH4000 Air Purifier
Unit Count: 1.0 Count
Item Dimensions D x W x H: 8.15"D x 12.36"W x 17.09"H
Item Weight: 9.68 Pounds
Specification Met: CARB Certified, DOE Certified, ETL Certified, FCC Certified
Color: White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, May 26
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
This is such a great machine. It's quiet, it blows clean air, it's easy to use, and the lights are not too bright. My mom lives in an old apartment with swamp coolers instead of a/c. It always smelled dank and musty, and it aggravated her cough. After just a few days of using this machine with it reaching green air levels, it's not as musty in her apartment and she's breathing better. I may actually get this for my house, it works so well.
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Reviewed in the United States on May 3, 2026 by RoxyLeigh
Color: White
I absolutely love this we are both smokers and have two dogs that shed and my husband has eye allergies ever since we got this machine the air is clear we are both breathing better the dog hair is less it is quiet and easy to put together it is a value for the money and I would suggest it to anyone
Reviewed in the United States on May 3, 2026 by deborah
Color: White
I leave her on auto, and the second someone enters my home with air quality issues, this little psychopath reacts like she just caught a personal insult. Red light. Full blast. Immediate violence. She starts Hoovering the room like she is trying to rip a curse out of the drywall. She’s loud, yes, but so is exorcism. Once she has finished sucking the spirit of Lucifer out of the room, she returns to a soft green glow like nothing happened. Calm. Moisturized. Unbothered. Silently judging the air quality like a tiny offended housekeeper. It is mostly just me here, but guests have generously contributed a revolving bouquet of violations against God and nature:. She does not simply detect odors. She takes them personally. A natural armpit, stale cigarette smoke, vape clouds, wet dog, colon-powered weather events,, that cheap spray cologne that smells like a restraining order and a Nissan Altima with one mismatched door panel — she identifies every last one of them with the speed and fury of a tiny plastic narc. I have had her running for about five weeks straight and her filter is still at 93%, which is frankly incredible considering the war crimes she has had to process. Granted, it is mostly just me here, but every now and then somebody wanders in smelling like failure, regrets, and decisions made in a gas station parking lot, and she handles it like a seasoned professional. For the price, her size, and her unwavering commitment to defending my lungs from the sins of mankind, she gets 5 stars. She is small, petty, efficient, and mean in all the right ways.
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Reviewed in the United States on March 31, 2026 by Seth
Color: White
This works and performs very well. Great settings with a digital read out that shows you how bad your air is. I baught another one 1 day later because it is so good. Easily cleans air for up to about 1500 sq.' I put one with me in my work shed and its amazing how 2 seconds of 2 stroke smoke makes this thing take off when on automatic because the smoke that unfortunately smells so good is toxic as hell to breath but it was an eye opener to see. Not only did it out perform all the others I tried but was also the quietest by far. runs Set it on auto and forget it. Has night light if you use it where you sleep and not only does it have digital read out it changes color when it hits certain bad air thresholds. Filters are easy to pull out and wash too. What's interesting about this design is it pulls air in from front and back and then forces it out through both sides and because of this the dirty intake air is being filtered through the two biggest sides which allows more air to be filtered in a shorter time period and why it is so efficient with such a small foot print. It takes up very little space and is easy to move where you want to use it with its built in handle on each side and because its so small it makes it light as a feather. It also has 4 fan level settings, an eco mode, an auto mode wich cranks up the fan higher when it detects bad air and a pet mode that really cranks it up to get rid of the dander that people are so allergic too. If you are always sneezing from pets or allergies vacuum often and get you one of these and it will amaze you how it will get rid of those irritating allergies within a couple of days. I can actually breath through my nose when I sleep now cause my nose isnt clogged up anymore so I wake more rested cause I am sleeping so soundly and sleep without waking up100 times trying to breath. It will also help if you snore because your nose will no longer be clogged. I picked it up on sale which the price is awesome compared to anything that has specs anywhere as good as this one. I tried 5 different brands of air purifiers and this one hands down beat them all in everyway possible. This fan spins at a higher rpm too and is still quieter than all of the others that I tried.
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Reviewed in the United States on April 2, 2026 by Hydeme
Color: White
Not only was this so easy to put together, but it is INCREDIBLY high quality. The breath ability in my home air was INSTANT. The fan settings are perfect, it’s compact enough to fit almost anywhere, it runs quiet and has seemed to really control the dust in my home. Love it!
Reviewed in the United States on May 7, 2026 by Tamara Krysten
Color: White
So far so good, as I have only had it about 3 weeks. I wish it could be set for 24 hours on & then just automatically shut off when the air is good. i may give another review after I have used it for a few months.
Reviewed in the United States on May 7, 2026 by Cheryl
Color: White
I've been really pleased with our KNKA Air Purifier. Although I can't vouch for the technicallities or whether it actuallly works for a room up to 3500 sq. feet, it seems to be working in our home (in appoximately 1000 sq. ft. of shared living space). It was super simple to put together, is easy to use, and is quiet and unassuming, yet it seems to sense when the air needs purifying. It is near our kitchen on auto mode, and whenever I cook, I hear it ramp up ever so slightly, indicating higher particulate in the air. I was weary about purchasing considering the cost, some of the negative reviews, and other models of air purifiers that inluencers promote constantly (they've got to be better if everyone is talking about them right?!), but based on the overhwlemingly positive reviews, I gave this a chance, and I'm glad I did. To the mom who wants to do something, anything to get cleaner air in her home to support her family, I recommend starting here. Anything is better than nothing, and this little, yet powerful purifier is a great first investment to your family's health!
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Reviewed in the United States on February 23, 2026 by Gabrielle Lewis