KNKA Air Purifier for Home Bedroom Large Room Up to 3,500 Ft², HEPA Air Cleaner with Washable Pre-Filter, AHAM VERIFIDE, AQI Display, ECO Mode, Pet Mode for Pets, Allergies, Dust, Pollen, APH4000
Original price was: $149.99.$119.99Current price is: $119.99.
Price: $149.99 - $119.99
(as of Dec 14, 2025 10:35:24 UTC – Details)
From the brand
Welcome to KNKA store ~
Founded in 2005, KNKA specializes in environmental appliances including dehumidifiers, air purifiers, and humidifiers. With a professional design team and strict quality control, we balance performance with minimalist aesthetics. At KNKA, we believe clean air is the foundation of a happy life, which is why we focus on advanced technology and elegant design to create fresher, more comfortable living spaces.
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
ASIN : B0FNDG2TNK
Best Sellers Rank: #2,855 in Home & Kitchen (See Top 100 in Home & Kitchen) #16 in HEPA Filter Air Purifiers
Customer Reviews: 4.9 4.9 out of 5 stars (794) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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 242 CFM (411 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. Filters the air in rooms up to 3,500 ft² once every hour, making it ideal for large rooms, living areas, and shared spaces.
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.
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.
𝐇𝐚𝐬𝐬𝐥𝐞-𝐅𝐫𝐞𝐞 𝐌𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞: The filter replacement indicator notifies you when it’s time for a change. For optimal performance, replace the filters every 3–6 months. Use genuine KNKA filters (search B0FQNYGVZF on Amazon).
Customers say
Customers find the air purifier effective and appreciate its whisper-quiet operation, particularly in sleep mode. The device works well in any space, quickly eliminating pet hair and odors after grooming sessions, and customers like its sleek, unobtrusive design. They find it easy to set up, with assembly taking just 5 minutes, and consider it worth the price, noting it saves money on replacements.
4 reviews for KNKA Air Purifier for Home Bedroom Large Room Up to 3,500 Ft², HEPA Air Cleaner with Washable Pre-Filter, AHAM VERIFIDE, AQI Display, ECO Mode, Pet Mode for Pets, Allergies, Dust, Pollen, APH4000
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Original price was: $149.99.$119.99Current price is: $119.99.
JosephK –
Pleasantly surprised — this actually helped!
I bought this KNKA air purifier because my room had this weird mix of dust + stale smell that just wouldn’t go away no matter how much I cleaned. I wasn’t expecting a miracle, just hoping it would maybe help a little.Honestly, after running it for a couple of days, the difference was pretty noticeable.Before: I’d wake up with a slightly stuffy nose and the room always felt a bit “heavy.”After: The air just feels lighter and cleaner. I don’t get that dusty smell anymore, and my nose isn’t irritated when I wake up. It’s one of those changes you don’t realize you needed until you experience it.It’s also much quieter than I thought — the sleep mode is basically a soft hum. I just leave it on and forget about it. Setup took like 30 seconds, and the controls are really simple.Overall, this thing solved the exact problem I got it for. Not fancy, not complicated, just does its job really well. And, most importantly, the price is very reasonable. Happy I picked it up.
Tim Y. –
Quiet and covers large area
I absolutely love this air purifier and definitely give it 5 out of 5 stars. It’s very effective, and the whisper-quiet operation, especially in sleep mode, makes it easy to forget it’s even on. It works well in any space. Setting it up was simple, and using it every day is straightforward. I also really like the size; it covers my living room (about 500 SF) without any issues. For the performance you get, it’s worth the price, and the replacement filters are affordable. The sleek, unobtrusive design fits right into my home without standing out. Please note it uses 2 filters, one in the front one in the back.
NAM V –
Compact but powerful and effective little air purifier
First of all, shipping is fast and the package arrived at our home intact. Kudos seller and Amazon for that.This is the first time we have had an air purifier. We have asthma and allergies throughout our whole family so it was about time we invested in something like this. So far we have already noticed less sneezing and it really seems like I can breath easier.This KNKA air purifier is small and compact, it packs a fair amount of features that I really did not expect.Well, it is actually hard to gauge what the performance is because I don’t have a way to measure air quality before and after use, it sure seems like it works well. It’s compact, won’t readily tip over since there are two legs that can be attached and removed at the bottom of the unit.The 4 fan settings go from a quiet home to not near hurricane force, and it feels like it’s processing a lot of air. The unit emits a pretty green light that can be nice as a night light in your room, this light can be turned off, the night mode will turn it into a quieter and all lights will be off. The night mode has a timer, so you can set it by your bed for a couple hours, and it runs pretty quiet. I was also very happy with the price compared to a lot of other models on the market.The best feature I really love is that is extremely quiet, When I run it at night, the sound is practically inaudible, none of us can even hear it when it is running. It is not to big so works well in any space we put it in and it helps take care of some of the cat odors we have in the house as well which is always something you struggle with when having cats! I love the ability to read the air quality and set the machine to you preferences. I will never not own one of these again especially for the health benefits of my family!Final ThoughtsCompact but powerful and effective air purifier for medium to large rooms. If your space is limited but you want to enjoy clean air, this is the machine you would want to invest into. It’s quiet, versatile, and easy to use, making it a solid choice for anyone looking to improve air quality at home.
Summer E Zachary –
Awesome Air Purifier
I’ve been using this air purifier and I can confidently say it’s one of the best purchases I’ve ever made for my home. From the moment I turned it on, I could literally feel and smell the difference in air quality.The dual HEPA filters do an amazing job capturing dust, pollen, and pet dander — my allergies have practically disappeared! I have a dog, and before this purifier, there was always that faint “pet smell” in the air. Now? It’s gone. The activated carbon filter is incredibly effective at eliminating odors and absorbing cooking smells. Even after a busy day in the kitchen, the air stays fresh and clean.What really stands out is how quiet the unit is. On the lower settings, it’s barely noticeable, making it perfect for nighttime use. I sleep better knowing I’m breathing clean air. The design is also sleek and modern, so it blends nicely with my decor instead of looking bulky or industrial.I also appreciate the smart features — the air quality sensor and automatic mode work flawlessly. It adjusts fan speed depending on the air quality, so I don’t have to think about it at all. The filter replacement indicator is another great touch that makes maintenance super easy.Overall, this air purifier has truly exceeded my expectations. My home feels fresher, my sinuses are clearer, and the air smells pure and crisp every day. If you’re on the fence, go for it — you won’t regret it!