1. Introduction
This manual provides essential instructions for the proper use, installation, and maintenance of your Clean Air Optima W-02 Water Filter. This filter is designed for use with Clean Air Optima CA-604 Smart and CA-605 Smart humidifiers.
2. Product Overview
The Clean Air Optima W-02 water filter is an essential component for your CA-604 Smart and CA-605 Smart humidifiers. It ensures decalcification, cleaning, and softening of tap water, preventing limescale buildup and unpleasant odors. Regular replacement and cleaning are crucial for optimal humidifier performance and air quality.

Image 1: Clean Air Optima W-02 Water Filter. A white cylindrical water filter with a perforated top, designed for Clean Air Optima humidifiers.

Image 2: Clean Air Optima W-02 Water Filter packaging. The retail packaging for the Clean Air Optima W-02 water filter, showing the filter and product information in multiple languages.
3. Setup and Installation
Follow these steps to properly install the W-02 water filter into your compatible Clean Air Optima humidifier:
- Ensure your humidifier is unplugged and turned off before beginning installation.
- Carefully remove the water tank from the humidifier base.
- If replacing an old filter, unscrew the used water filter from the bottom of the water tank. Dispose of the old filter responsibly.
- Screw the new Clean Air Optima W-02 water filter firmly into the designated opening at the bottom of the water tank. Ensure it is securely fastened to prevent leaks.
- Refill the water tank with fresh tap water.
- Place the water tank back onto the humidifier base, ensuring it is seated correctly.
- Plug in and turn on your humidifier. The filter will begin its function automatically.
4. Operating Instructions
Once correctly installed, the W-02 water filter operates automatically as an integral part of your Clean Air Optima humidifier's water purification system. It continuously filters the water during humidifier operation, contributing to cleaner mist and a healthier indoor environment.
5. Maintenance
To maintain optimal performance of your humidifier and ensure effective water filtration, adhere to the following maintenance guidelines for your W-02 water filter:
- Weekly Cleaning: Clean the water filter twice a week by rinsing it thoroughly under running tap water. This process helps remove accumulated impurities and ensures efficient operation.
- Filter Replacement: The Clean Air Optima W-02 water filter has an estimated lifespan of 1 to 3 months. This duration can vary based on local water hardness and the frequency of humidifier usage. Replace the filter regularly to maintain effective decalcification, prevent limescale buildup, and avoid the formation of unpleasant odors. Refer to your humidifier's display or indicator for filter replacement reminders.
6. Troubleshooting
If you observe any of the following issues, consider replacing your W-02 water filter:
- Reduced humidifier mist output or efficiency.
- Increased limescale buildup on humidifier components despite regular cleaning.
- Presence of unpleasant odors emanating from the humidifier.
Ensure the filter is correctly installed and cleaned as per the maintenance instructions before considering replacement. A new filter often resolves these common issues.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | W-02 |
| Brand | Clean Air Optima |
| Compatible Devices | Clean Air Optima CA-604 Smart, CA-605 Smart Humidifiers |
| Material | Plastic |
| Product Dimensions | 4 x 4 x 7.5 cm |
| Product Weight | 300 grams |
| Estimated Lifespan | 1 to 3 months |
8. Warranty and Support
For product support, replacement parts, or warranty inquiries regarding your Clean Air Optima W-02 Water Filter, please contact Clean Air Optima customer service directly. You can find contact information on the official Clean Air Optima website or through your purchase documentation. The EU spare part availability duration for this product is 3 months.





