1. Introduction and Overview
This manual provides essential information for the proper installation, operation, and maintenance of your KNKA APH4000 Air Purifier Replacement Filters. Using genuine KNKA filters ensures optimal performance and longevity of your air purifier.
The KNKA APH4000 replacement filters are specifically designed for the APH4000 air purifier model. This 2-pack includes original True HEPA filters, engineered for reliable performance and long-lasting use. Each filter has an estimated service life of up to 3,000 hours, with a recommendation to replace them every 6 to 8 months for optimal air purification.
2. Advanced Filtration Technology
The KNKA APH4000 replacement filters feature advanced multi-layer filtration technology to effectively clean your indoor air:
- True HEPA Filter: Traps fine particles down to 0.3 microns, including dust, pollen, and pet dander, contributing to a fresh and comfortable indoor environment.
- Activated Carbon Layer: Helps reduce common household odors from cooking, pets, and smoke, as well as volatile organic compounds (VOCs).

Image: Advanced 3-Layer Filtration with Dual Filters for Complete Air Protection, illustrating the different filter layers.

Image: Close-up of the True HEPA Filter, showing its ability to trap fine particles.

Image: Activated Carbon Filter, illustrating its porous structure for odor and VOC removal.
3. Setup and Installation
Filter replacement is a tool-free process. Follow these steps to install your new filters:
- Turn off the air purifier and unplug the power cord.
- Open the purifier covers on both sides and remove the used filters.
- Install the new filters. Ensure you remove any protective plastic packaging from the new filters before installation. Close the covers securely.
- After installing new filters, turn on the purifier and press and hold the Filter button for 5 seconds until you hear three beeps to reset the indicator light.

Image: Step 1 of filter replacement, showing the user turning off and unplugging the air purifier.

Image: Step 2 of filter replacement, showing the user opening the side covers and removing old filters.

Image: Step 3 of filter replacement, showing the user inserting new filters and closing the covers.
Video: Quick Start Guide for KNKA Air Purifier, demonstrating initial setup and filter installation.
4. Operation
After installing the new filters, ensure the filter indicator light is reset. This is typically done by pressing and holding the 'Filter' button on your air purifier's control panel for approximately 5 seconds until you hear a confirmation sound (e.g., three beeps).

Image: Control panel of the air purifier, highlighting the 'Filter Alert' button for checking and resetting filter life.
5. Maintenance
For optimal performance, it is recommended to replace the KNKA APH4000 filters every 6 to 8 months, or after approximately 3,000 hours of use. The actual replacement interval may vary depending on usage frequency and environmental air quality.

Image: Visual reminder to replace filters every 3-6 months, showing a comparison between new and used filters.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | KNKA |
| Model Info | APH4000LX |
| Item Weight | 1.76 pounds |
| Product Dimensions | 11.89 x 10.67 x 1.14 inches |
| Compatible Device | Air Cleaner (KNKA APH4000 Air Purifier) |
| Material Type | Cotton |
| Included Components | 2 Pack Air Purifier Filter |
| UPC | 769016330906 |
7. Troubleshooting
If your air purifier is not performing as expected after filter replacement, consider the following:
- Filter Packaging: Ensure all protective plastic packaging has been completely removed from both new filters before installation.
- Proper Installation: Verify that the filters are correctly seated within their compartments and that the covers are securely closed.
- Filter Reset: Confirm that the filter indicator light has been reset by pressing and holding the Filter button for 5 seconds.
- Power Adapter: Ensure the power adapter is correctly located and connected under the air purifier.
8. Support
For any questions or assistance, please reach out to KNKA customer support. We are committed to providing hassle-free after-sales support.
- Email: support@myecoself.com
- Website: www.myecoself.com
- Facebook: facebook.com/Ecoself.Official




