1. Introduction
Thank you for choosing the SLEVOO Air Purifier Model BS-20. This device is designed to improve indoor air quality by effectively filtering various airborne particles and odors. Please read this manual thoroughly before operation to ensure proper use, maintenance, and optimal performance.
The SLEVOO Air Purifier BS-20 features a 3-in-1 filtration system, quiet operation, and an integrated aromatherapy function, making it suitable for various home environments.

Image 1.1: SLEVOO Air Purifier Model BS-20. This image displays the overall design of the black SLEVOO Air Purifier, highlighting its cylindrical shape and control panel on top.
2. Product Overview
2.1 Key Features
- 3-in-1 Filtration System: Includes a Pre-Filter, H13 True HEPA filter, and Activated Carbon filter to capture 99.97% of particles as small as 0.1 microns.
- Wide Coverage: Effectively purifies air in spaces up to 1015 ft².
- Ultra-Quiet Operation: Operates as low as 24dB in Sleep Mode for undisturbed rest.
- Aromatherapy Function: Built-in aroma box allows for the addition of essential oils.
- 360° Air Intake: Ensures efficient air circulation and purification.
- Multiple Fan Speeds: Adjustable fan settings for various purification needs.
- Timer Function: Set operation for 2, 4, 6, or 8 hours.
- Night Light: Soft ambient light feature.
- Filter Replacement Reminder: Indicator for timely filter maintenance.
2.2 Components
Familiarize yourself with the main components of your air purifier:
- Control Panel: Located on the top of the unit, for all operational settings.
- Air Outlet: Top section where purified air is released.
- Air Inlet: Lower section with perforations for 360° air intake.
- Filter Compartment: Located at the base, housing the 3-in-1 filter.
- Aroma Box: Small tray near the control panel for essential oils.
- Power Cord: For connecting the unit to an electrical outlet.

Image 2.1: Internal structure and airflow. This diagram illustrates the 360-degree air intake, internal motor, and upward airflow of the SLEVOO Air Purifier, emphasizing its quiet and efficient design.
3. Safety Instructions
- Always place the air purifier on a firm, level surface.
- Keep the unit at least 1 foot (30 cm) away from walls or furniture to ensure proper airflow.
- Do not block the air inlets or outlets.
- Unplug the air purifier before cleaning or performing any maintenance.
- Do not operate the unit with a damaged cord or plug.
- Keep the unit away from water or moist environments.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Do not use essential oils directly in the air outlet; use only the designated aroma box.
4. Setup
4.1 Unpacking
- Carefully remove the air purifier from its packaging.
- Remove any plastic bags or protective materials.
- Retain the packaging for future storage or transport.
4.2 Filter Installation
The filter may come pre-installed but wrapped in plastic. Ensure the plastic is removed before first use.
- Turn the unit upside down.
- Twist the base cover counter-clockwise to unlock and remove it.
- Remove the plastic-wrapped 3-in-1 filter.
- Remove all packaging from the filter.
- Insert the unwrapped filter back into the unit with the pull tabs facing outwards.
- Replace the base cover and twist clockwise to lock it securely.

Image 4.1: Filter access and replacement. This image demonstrates how to unlock the base of the air purifier to access and replace the filter.
4.3 Placement
Place the air purifier on a flat, stable surface in the desired room. Ensure there is adequate space around the unit for optimal air circulation.
5. Operation
Plug the power cord into a standard electrical outlet. The unit is now ready for operation.

Image 5.1: Control Panel Overview. This image displays the top control panel of the air purifier, showing buttons for power, fan speed, timer, sleep mode, night light, and filter reset.
5.1 Power On/Off
- Press the Power Button (
) to turn the unit on or off.
5.2 Fan Speed Adjustment
- Press the Fan Speed Button (
) repeatedly to cycle through low, medium, and high fan speeds.
5.3 Sleep Mode
- Press the Sleep Mode Button (
) to activate the ultra-quiet sleep mode. The night light will turn off automatically in this mode.

Image 5.2: Noise levels at different settings. This graphic illustrates the decibel levels of the air purifier at various fan speeds, including the ultra-quiet 23dB Sleep Mode.
5.4 Timer Function
- Press the Timer Button (
) to set the operating time for 2, 4, 6, or 8 hours. The unit will automatically shut off after the selected duration.
5.5 Night Light
- Press the Light Button (
) to turn the night light on or off.
5.6 Aromatherapy Function
- Locate the aroma box near the control panel.
- Add a few drops of your preferred essential oil to the aroma pad inside the box.
- Close the aroma box. The scent will diffuse with the purified air.
- Note: Do not pour essential oils directly into the unit or filter.

Image 5.3: Aromatherapy box usage. This image shows a hand adding essential oil drops into the designated aroma box on top of the air purifier.
6. Maintenance
6.1 Filter Replacement
The filter replacement indicator will illuminate when it's time to change the filter. For optimal performance, it is recommended to replace the filter every 3-6 months, depending on usage and air quality.
- Unplug the air purifier from the power outlet.
- Turn the unit upside down and twist the base cover counter-clockwise to remove it.
- Remove the old 3-in-1 filter by pulling on the tabs.
- Insert a new SLEVOO certified filter (Model BS-20F) into the unit.
- Replace the base cover and twist clockwise to lock it.
- Plug in the unit. Press and hold the Filter Reset Button (often combined with another function, refer to control panel diagram) for 3-5 seconds until the indicator light turns off, resetting the filter timer.

Image 6.1: 3-stage HEPA filtration system. This image details the layers of the filter: Pre-Filter, H13 HEPA Filter, and Activated Carbon Filter, and their respective functions in capturing various pollutants.
6.2 Cleaning the Unit
- Unplug the air purifier before cleaning.
- Wipe the exterior of the unit with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
- The pre-filter layer of the 3-in-1 filter can be gently vacuumed to remove larger dust and pet hair particles between replacements. Do not wash the HEPA or activated carbon layers.
- Clean the aroma pad in the aroma box as needed.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on | Not plugged in; Power outage; Filter not installed correctly. | Ensure power cord is securely plugged in; Check power supply; Verify filter is unwrapped and base cover is locked. |
| Reduced airflow or purification efficiency | Filter is dirty or clogged; Air inlets/outlets blocked. | Replace the filter; Ensure no obstructions around the unit. |
| Unusual noise | Unit not on a level surface; Foreign object inside; Filter not seated properly. | Place on a flat surface; Unplug and check for obstructions; Reinstall filter. |
| Filter replacement indicator remains on after changing filter | Filter timer not reset. | Press and hold the Filter Reset Button for 3-5 seconds. |
8. Specifications
- Model: BS-20
- Brand: Slevoo
- Product Dimensions: 6.7"D x 6.7"W x 13.46"H (17 x 17 x 34.2 cm)
- Item Weight: 4.51 Pounds (2.05 kg)
- Rated Power: 15 Watts
- CADR (Clean Air Delivery Rate): 170 m³/h (100 CFM)
- Applicable Area: Up to 1015 ft² (for one air change per hour)
- Noise Level: 24dB (Sleep Mode) - 50dB (High Speed)
- Filtration: H13 True HEPA 3-in-1 Filter (Pre-Filter, H13 HEPA, Activated Carbon)
- Certifications: CARB Certified, ETL Certified, FCC Certified
9. Warranty and Support
For warranty information, technical support, or replacement parts (such as filters), please refer to the official Slevoo website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
Contact Information: Please visit www.slevoo.com for the latest support details.





