Introduction
This instruction manual provides essential information for the proper installation and maintenance of your QXCIVR 3-piece replacement air purifier filter kit. This kit is designed to maintain optimal air purification performance in compatible air purifier models.
Compatibility
This filter kit is compatible with the following air purifier models:
- AC4002
- AC4004
- AC4012
The kit replaces filter models AC4121, AC4123, and AC4124.
Product Overview and Features
The QXCIVR filter kit includes three distinct filter types, each designed for specific air purification tasks:
- Primary Filter: Effectively filters larger particles and animal hair.
- HEPA Filter: Effectively filters PM2.5, PM0.01, germs, and other fine particulates.
- Activated Carbon Filter: Effectively filters formaldehyde, odors, and other decoration pollutants.

Image description: A diagram illustrating the three stages of filtration. The top layer is the Primary Filter, followed by the HEPA filter, and then the Activated Carbon filter at the bottom. Arrows show air flowing downwards through each layer, with text explaining what each filter targets.
Installation Instructions
Replacing the filters in your air purifier is a straightforward process that requires no special tools. Follow these general steps:
- Power Off: Ensure your air purifier is unplugged from the power outlet before beginning any filter replacement.
- Access Filter Compartment: Refer to your air purifier's original manual to locate and open the filter compartment. This usually involves removing a cover or panel.
- Remove Old Filters: Carefully remove the used filters. Dispose of them according to local regulations.
- Insert New Filters: Place the new QXCIVR filters into the compartment. Ensure they are oriented correctly as indicated by your air purifier's markings or the original manual. The kit typically includes a pre-filter, a HEPA filter, and an activated carbon filter.
- Close Compartment: Securely close the filter compartment cover or panel.
- Power On: Plug your air purifier back into the power outlet.
- Reset Filter Indicator (if applicable): If your air purifier has a filter replacement indicator, follow its specific instructions to reset it. This usually involves pressing and holding a button for a few seconds.

Image description: A visual representation of the three distinct filters included in the kit: a black pre-filter with a yellow frame, a black honeycomb-patterned activated carbon filter, and a white pleated HEPA filter.
Maintenance and Replacement
For optimal performance and air quality, it is recommended to replace your air purifier filters regularly. The replacement frequency depends on usage, air quality in your environment, and the specific air purifier model. As a general guideline, filters should be replaced every 6-12 months. Refer to your air purifier's original manual for specific recommendations.
Signs it's time to replace your filters:
- Decreased airflow from the air purifier.
- Increased noise from the air purifier.
- Noticeable odors returning or not being filtered.
- The filter replacement indicator light on your air purifier (if equipped) illuminates.
Troubleshooting
If you experience issues after replacing your filters, consider the following:
- Air Quality Not Improving: Ensure all filters are installed correctly and securely. Verify that the air purifier is operating on the appropriate setting. If issues persist, the filters may be saturated, or the air purifier itself may require servicing.
- Filter Indicator Light Remains On: After replacing filters, ensure you have reset the filter life indicator on your air purifier, if applicable. Consult your air purifier's manual for instructions on how to reset it.
Specifications
This QXCIVR filter kit includes three filters with the following approximate dimensions:
| Filter Type | Dimensions (L x W x H) |
|---|---|
| Primary Filter (Yellow Frame) | 317 mm x 288 mm x 10 mm |
| Activated Carbon Filter (Honeycomb) | 317 mm x 291 mm x 10 mm |
| HEPA Filter (White Pleated) | 317 mm x 291 mm x 18 mm |

Image description: A side-by-side view of the three filters, each labeled with its specific dimensions in millimeters. Below the filters, a table reiterates the dimensions and confirms "3pcs/set".
Warranty and Support
For any questions regarding the QXCIVR air purifier filter kit, please contact your retailer or the manufacturer directly. Information regarding specific warranty terms, if applicable, can typically be found with your purchase documentation.