1. Introduction
This manual provides essential information for the Purivortex AC400 Pet Care HEPA Replacement Filter. This 3-in-1 filter is designed to work with Purivortex AC400 air purifiers, offering enhanced air freshness, especially in households with pets. It effectively captures pet hair, dander, odors, lint, and dust.
The filter features a multi-layer design:
- Pre-filter: Captures larger particles like pet hair and lint.
- HEPA Layer: Traps fine particles such as pet dander, dust mites, and pollen.
- Activated Carbon Layer: Absorbs odors from pets, cooking, and smoke.

Figure 1: Exploded view illustrating the multi-layer design of the Purivortex AC400 Pet Care HEPA Replacement Filter, showing the sealing ring, pre-filter, HEPA filter, and activated carbon filter.
2. Filter Replacement Instructions
To maintain optimal performance of your Purivortex AC400 air purifier, replace the filter every 3-6 months, or when the filter replacement indicator light illuminates. Ensure all packaging is removed from the new filter before installation.
- Power Off and Unplug: Before attempting any maintenance, ensure the air purifier is turned off and unplugged from the power outlet.
- Access Filter Compartment: Gently twist the top section of the air purifier counter-clockwise to unlock it. Lift the top section off to reveal the filter compartment.
- Remove Old Filter: Carefully pull the old filter upwards and out of the air purifier. Dispose of the used filter responsibly.
- Insert New Filter: Remove the new Purivortex AC400 replacement filter from its protective plastic packaging. Insert the new filter into the air purifier, ensuring it sits securely in the compartment.
- Secure Top Section: Place the top section back onto the air purifier, aligning the arrows or markings. Twist clockwise to lock it into place.
- Plug In and Reset: Plug the air purifier back into the power outlet. If the filter replacement indicator light was on, press and hold the "Reset Filter" button (or equivalent, typically the power button or a dedicated filter button) for 3-5 seconds until the light turns off. This resets the filter life monitor.

Figure 2: The Purivortex AC400 Pet Care HEPA Replacement Filter, showing its cylindrical shape and overall design.

Figure 3: Dimensions of the Purivortex AC400 filter, measuring approximately 6.3 inches (16 cm) in diameter and 6.6 inches (16.7 cm) in height. Ensure these dimensions match your air purifier model.
3. Operating the Air Purifier (with new filter)
Once the new filter is installed and the air purifier is plugged in, you can resume normal operation. The Purivortex AC400 air purifier typically features controls on its top panel.
- Power Button: Turns the unit on or off.
- Speed Settings: Allows selection of different fan speeds (e.g., low, medium, high) to adjust purification intensity.
- Timer Function: Sets the air purifier to operate for a specific duration (e.g., 2, 4, 8 hours) before automatically shutting off.
- Night Light: Provides an optional ambient light feature, often with multiple color choices or a color-changing mode.
Refer to your Purivortex AC400 air purifier's main user manual for detailed operating instructions specific to its control panel and features.
4. Maintenance
Regular filter replacement is the primary maintenance requirement for your Purivortex AC400 air purifier. The filter is designed for a lifespan of 3-6 months under normal usage conditions. Factors such as air quality, pet presence, and operating hours can influence the actual filter life.
- Filter Life Indicator: Your air purifier is equipped with an indicator light that will illuminate when it's time to replace the filter.
- Cleaning: The filter itself is not washable and should not be cleaned. Attempting to clean the filter can damage its structure and reduce its effectiveness.
- Exterior Cleaning: Periodically wipe the exterior of the air purifier with a soft, dry cloth to remove dust. Do not use abrasive cleaners or solvents.
5. Troubleshooting
Filter Replacement Indicator Remains On After Changing Filter
If the filter replacement indicator light remains illuminated after you have installed a new filter, it means the filter life monitor needs to be reset manually.
- Solution: With the air purifier powered on, press and hold the "Reset Filter" button (or the power button, depending on your specific model) for approximately 3-5 seconds until the indicator light turns off. This action resets the internal timer for the filter life.
Reduced Airflow or Odor Persistence
If you notice a decrease in airflow or persistent odors despite regular operation, consider the following:
- Check Filter Condition: Even if the indicator light is not on, heavily polluted environments or continuous use can shorten filter life. Visually inspect the filter for excessive dirt or discoloration.
- Ensure Proper Installation: Verify that the filter is correctly seated and the air purifier's top section is securely locked.
- Room Size: Ensure the air purifier is appropriately sized for the room it is operating in.
6. Specifications
| Brand | Purivortex |
| Model Number | AC400 |
| Compatible Devices | Purivortex AC400 Air Purifiers |
| Filter Type | 3-in-1 Pet Care HEPA Replacement Filter (Pre-filter, HEPA, Activated Carbon) |
| Material | Nylon (for certain components), FSC-Certified paper (for filter media) |
| Product Dimensions (L x W x Th) | 6.3"L x 6.3"W x 6.6"Th (16cm x 16cm x 16.7cm) |
| Item Weight | 0.24 Kilograms |
| MERV Rating | 13 |
| Recommended Replacement | Every 3-6 months |
7. Warranty and Support
Purivortex products are designed for reliability and performance. The Purivortex AC400 air purifier, for which this filter is intended, typically comes with a 2-Year Warranty Support. Please refer to the original air purifier's user manual or the official Purivortex website for complete warranty terms and conditions.
For technical assistance, product inquiries, or warranty claims, please contact Purivortex customer support. Contact information can usually be found on the product packaging, the official Purivortex website, or within the original air purifier's user manual.

Figure 4: Image indicating Purivortex 2-Year Warranty Support.