Yes, we are one family! knkalife.com is our official brand website where we showcase our latest home environment technology and offer exclusive direct deals.

We are also proud to be a Top-Rated Brand on Amazon. You can visit our Amazon Official Store to check out our product lineup and see verified reviews from our global community.

Absolutely. We stand behind our quality 100%. Whether you purchased your air purifier or dehumidifier from this website or our Amazon store, our dedicated support team is here to assist you with manuals, warranty claims, and troubleshooting.

We apologize if the manual was missing from your box. We can email you the digital PDF manual for your specific model (e.g., APH4000, PD22sc) immediately. Please contact our support team with your model number.

For optimal performance:

• Ensure the room is enclosed (close windows and doors) to prevent new moisture from entering.
• Check that the air intake and outlet are not blocked by walls or furniture.
• Verify your settings (e.g., target humidity level vs. current room humidity).

If the issue persists, please contact us for troubleshooting.

The KNKA PD22sc Dehumidifier is designed to be efficient for spaces up to 40m² (approx. 430 sq ft). It is perfect for bedrooms, small basements, and living areas.

For air purifiers, we generally recommend replacing the HEPA filter every 6-8 months, depending on air quality. Some models have washable pre-filters; please check your specific user manual. Regular cleaning ensures the best air quality and device longevity.

Please check if the water tank (draining bucket) is full or not properly seated. Most dehumidifiers have an auto-shutoff safety feature when the tank is full or removed. If the tank is empty and correctly placed but the unit still won't start, please contact support.

Once your order ships, you will receive a confirmation email with a tracking number. If you haven't received it within 3 business days, please check your spam folder or contact us with your order name/email.

Standard shipping typically takes 5-10 business days. Please allow 1-2 days for order processing before shipment.

Yes, we ship to many regions. Shipping costs and times vary by location and will be calculated at checkout.

We offer a 30-day return policy. Items must be returned in their original condition. If you received a defective unit, please contact us immediately for a replacement or refund.

KNKA products typically come with a 1-year limited warranty against manufacturing defects. Detailed warranty terms can be found in your user manual or by contacting support.

Your order number is included in the confirmation email sent immediately after purchase. It usually starts with hashtag (e.g., #1001) or specific letters. If you cannot find it, provide us with your shipping name and email address so we can locate it for you.