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.$23.99Current price is: $23.99.
Price: $149.99 - $23.99
(as of Dec 01, 2025 19:11:22 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: #3,741 in Home & Kitchen (See Top 100 in Home & Kitchen) #25 in HEPA Filter Air Purifiers
Customer Reviews: 4.9 4.9 out of 5 stars 697 ratings 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, noting it works well in any space and quickly eliminates pet hair and odors after grooming sessions. They appreciate its sleek, unobtrusive design, easy setup, and whisper-quiet operation, particularly in sleep mode. The purifier covers large rooms without issues, and customers consider it worth the price, with affordable replacement filters.
5 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.$23.99Current price is: $23.99.
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.
Chat –
Excellent product
First off, the delivery was fast, the packaging was intact. I was excited to receive the item and truly did not disappoint. Very quick assembly is needed to complete. First, remove the plastic of the 3 stage air filter at the front and at the back. Clip the legs at the bottom, attach the charger at the port, and turn ON. Easy!Here is a bit more info. Air is sucked in thru the front and back of the item, which then go thru a 3 stage filtration, Yes, 3 stage it is!, Air is then vented out on the side. The machine has digital functions, with 4 mode settings. I like that it has a small filter on the side, to absorb my favorite scent to make my room smell good and clean. The display has a function to tell when the filters are dirty and will need cleaning. When turned ON, it is very powerful yet very quiet.This is really a great product, small and light enough to be moved from one place to another, yet effective and efficient to perform what I bought it for.This may be a great present for any occasion. Love, love this!
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!
Music Critic –
The best air purifier I have used
I LOVE this air purifier, it does a great job. We have two very large dogs. What comes with large dogs? A lot of pet dander. My dogs hang out with me daily in my home office. I purchased this to place in my home office to help minimize the dander and it has done a terrific job of removing excess dust and dander. I like that the purifier has dual filters. I have not had to replace these yet, but when it becomes necessary to do so, it will be a breeze as they are easily accessible. I also really like the ability to add essential oils to help freshen the air. I was a little concerned that the sound may be distracting while I am working but I do not even notice it, it is very quiet. The filter has led lights that signal the cleanliness of the air. Periodically, the light will change blue and you can hear the purifier increase its intensity, but that is rare. 95% of the time, the purifier is cruising along on green at a minimal amount of effort. I am very impressed with this purifier and am considering purchasing a second to replace a purifier that is located in our bedroom. Great product at a very fair price, I highly recommend it.
George –
Absolutely Fantastic Air Purifier – A Breath of Fresh Air!
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 d 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!