KNKA Air Purifiers for Home Bedroom Up to 1,695 Ft² in 1 Hr, APH4000, White | HEPA Sleep Mode Air Cleaner with Washable Pre-Filter, AHAM VERIFIED, AQI Display, Pet Mode for Pet Dander, Dust & Pollen
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Availability:
In Stock.
Arrives
Tuesday, Aug 4
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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 High-Efficiency 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.
Description
Founded in 2021, KNKA designs home appliances that make everyday living feel cleaner, lighter, and more comfortable. We focus on air care solutions, including dehumidifiers and air purifiers, combining high performance with refined, minimalist design. We believe technology should seamlessly enhance everyday life while preserving the beauty of modern homes.
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: #814 in Home & Kitchen (See Top 100 in Home & Kitchen) #4 in HEPA Filter Air Purifiers
#4 in HEPA Filter Air Purifiers:
Customer Reviews: 4.7 4.7 out of 5 stars (2,893)
Power Source: ac_dc
Control Method: Touch
Filter Type: HEPA
Floor Area: 350 square_feet
Noise Level: 22 db
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
Unit Count: 1 Count
Manufacturer: KNKA
Warranty Description: 2-Year Warranty
Included Components: 1 x Air Purifier, 2 x 3-Stage Original Filter (Pre-Installed), 1 x User Manual
Item Type Name: APH4000 Air Purifier
Part Number: APH4000
Item Dimensions D x W x H: 8.15"D x 12.36"W x 17.09"H
Item Weight: 9.7 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, Aug 4
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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Similar Products
Top Amazon Reviews
Color: White
I was skeptical about this air purifying unit at first, but after a month of use, it completely changed my mind. I have nothing but praise for this excellent air cleaner. Setup was super easy, and the two extra-large carbon filters on each side are a huge plus. The bedroom where my bedbound wife stays had started to smell musty and collect a lot of dust, but within just two days of running and adjusting the speed of the unit, dust and odor particle levels dropped from .23 to 0.007 and breathability went from toxic to super clean. A couple of things to note: after a month, be sure to clean the unit outdoors. The intake fins on both sides were packed with dust from pulling in air to purify. I used a leaf blower outside and was shocked at the size of the “dust bunnies” that came out of the intake covers and filters. I tried washing the filters, but be careful with the silver tape on the edges—it can start to fail when wet. I recommend buying two new filters every three months rather than washing them with water. Blowing them out with a leaf blower works well to remove particulates and helps extend filter life. Overall, this purchase is an easy win. It cost half as much as other units and, in my opinion, performed far better and quieter than the pricey ones.
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Reviewed in the United States on June 22, 2026 by Mr. Balloon LLC
Color: White
Okay, I don't normally jump on here to review products, but this filter is one of the most well-made items I've purchased in years. It works flawlessly and quietly. Setup was easy and I daresay fun. Everything fits together perfectly. It moves a ton of air for its size. Operation is a cinch. And it's markedly improved the air quality in our house, as well as reducing the amount of dust that gathers on everything. I move it around the house sometimes, just to give each room a little boost. I will probably end up buying another one at some point.
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Reviewed in the United States on July 16, 2026 by Jason M. Spencer
Color: White
This thing works so well! I have three dogs and they sleep with me in my room and I also have my PC in there and it gets so dusty and dirty and ever since I bought this thing and keep it on pet mode, my room literally has little dirt and dust and it keeps the room smelling clean as well. I absolutely think this purifier is worth it. It's quiet, but does have a very satisfying hum to it which I've become reliant on since I hate the 'sound' of silence. The filters are dirty after a few months and it's crazy the amount of dirt this thing sucks up. Very impressed!!
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Reviewed in the United States on July 17, 2026 by Malachi
Color: Black
Excellent air purifier. It works quickly, easy to operate, and powerful. I have a pet cockatiel bird, who produces a lot of dust. I purposefully stood by the machine while my bird was preening and watch the dust get zapped in and disappear. Amazing! I have it in my living room right by my wall AC unit and I can see it actively work once my AC kicks in. Once the AC turns off, the purifier finishes cleansing the area and returns to baseline. It's very quiet, more quiet than the smaller shark brand I have in the other room. Birds have very sensitive respiratory systems so you have to be weary of products that off-gas, may produce ozone, or have PTFE coatings, all of these can be fatal to the bird. I messaged the customer service email to check, and not only were they very quick to acknowledge me, they were able to confirm that their filters don't have any of these issues. That is an A+++++ in my book. If you have a pet bird and in need of an air purifier, this one is definitely worth it!
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Reviewed in the United States on July 21, 2026 by Catherine Ruiz
Color: White
My review may be premature, as I've only had this item for a day... providing my initial thoughts fyi. The KNKA air purifier is smaller than I expected, but I admit that I didn't focus on the dimensions in the description. It arrives packaged in a very well-designed box, with styrofoam on top and bottom, and the legs, 110v adapter/plug, instructions, and a few tiny filters designed for adding essential oil (1) and something else that I haven't figured out yet (2). It assembles very quickly and easily. READ the instructions, as it has several automatic or manual ways of operating, and the user will benefit by this knowledge. Wow.. this thing is QUIET! I also really like that there are 3 different lighting options, including completely off (for a bedroom at sleepy time), completely on--including a cool "laser" like beam of green light along the floor letting you know from a distance that it is running, and an in-between on/off, with just the buttons lit up, but not the fancy floor light. Did I mention how quiet it is? I also like the "pet" feature, where if you switch to this mode, it jacks up the fan speed for a set period of time to clean out smells (apparently), and then drops back down into the auto mode. I'm not sure how it works, but the auto mode is said to sample room air and adjust the fan speed accordingly. If that's effective... what a great feature. I have a tall but not wide house, with 3 floors. I bought one per floor, but I think to be truly focused on clean air, one may want to install one per bedroom, plus whatever you need for other spaces in the home. The included filters are very high quality, with different layers as described. They fit absolutely perfectly inside the unit and will not allow air to leak in around the filter.
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Reviewed in the United States on July 29, 2026 by Rob
Color: White
Not as effective as I hoped for eliminating animal smells which is one of the main reasons I bought it. but seems to work well and overall good investment
Reviewed in the United States on July 26, 2026 by Amazon Customer
Color: White
Noise level is up to you, on low it is quiet. On high it is of course louder but not bad at all. Definitely removes dust, and the air quality indicator works very well. The timer works well too, but I leave it on 24/7 and it has been very durable in this mode. Provides allergy relief - this allergy season I have had no issues, and I usually sneeze!!
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Reviewed in the United States on July 26, 2026 by Tech dude
Color: White
After using this filter for one month straight everyday, I do feel like it does a difference in the quality of my air. Its not just blowing air but actually sucking and filtering all the contamination in my air. I have two cats, my window is open most of the time and I cook alot of steak. So when I turned this KNKA purifier on, it displays the score of my air quality and then drops after 30 minute of use. Noise level at night is very quiet. Lighting can be adjusted if it bothers you, keep all the lights off or just the light of the settings on. I put this next to my bed and I have been getting better sleep quality, no stuffy nose in the summer due to pollen or allergies. It is amazing! I will update videos soon and pictures.
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Reviewed in the United States on July 5, 2026 by Erick Cisneros