Description
xPurify the air where you live, work, and rest
The KNKA APH4000 air purifier is engineered for large living spaces, delivering verified performance with CADR ratings of 226 CFM for smoke, dust, and PM2.5, and 244 CFM for pollen. AHAM Verifide certification guarantees reliable, high‑speed air cleaning in busy homes, giving you a sense of control over indoor air quality without guesswork.
In real-world use, this model can refresh the air in spaces up to 1,695 ft² within an hour, making it a strong choice for open living areas, large bedrooms, or shared family rooms. Its dual front-and-back intake design and dual side outlets maximize circulation, helping to distribute clean air throughout the room for a more consistent experience.
Powerful yet practical filtration
The APH4000 features a dual filter system with a washable pre-filter, a True HEPA filter, and an activated carbon filter in a 3‑in‑1 configuration. This setup targets a wide range of particulates and odors while simplifying upkeep. The washable pre-filter traps larger particles, extending the life of the main filters, and the activated carbon adds odor control to everyday living.
- Washable pre-filter reduces the load on the main filters and lowers maintenance costs.
- True HEPA captures fine particles with high efficiency for cleaner air in active homes.
- Activated carbon helps mitigate everyday odors and some volatile compounds.
Smart modes for day-to-day life
Customize air cleaning with PET Mode for pet-related allergens, ECO Mode to save energy while preserving air quality, Sleep Mode for ultra-quiet nights, and Auto Mode with four fan speeds for effortless comfort at any time.
Real-time insight and maintenance ease
The built-in AQI display offers instant, color‑coded feedback on indoor air quality, so you know when to adjust. A dedicated filter replacement indicator helps you plan maintenance, and KNKA recommends replacing filters every 3–6 months with genuine KNKA parts for optimal results.
In everyday life, place the purifier in a living room, large bedroom, or home office to experience a noticeable improvement in air feel and freshness. The design supports quiet operation and a visually calm environment, helping you focus on daily tasks or unwind after a long day.
FAQ
Q: What size space is the KNKA APH4000 best suited for?
A: Capable of refreshing air in spaces up to 1,695 ft² within an hour, with high CADR for smoke, dust, and pollen.
Q: How should I maintain the filters and monitor performance?
A: Uses washable pre-filter, True HEPA, and activated carbon. Replace every 3–6 months; a reminder indicator helps you stay on track.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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