1. Product Overview
The DUMOS Armless Home Office Desk Chair (Model H3-2193WT-14DU) is designed for comfort and functionality in small office or home environments. This ergonomic chair features a high-density, thickened sponge cushion upholstered in high-quality PU leather, offering both waterproof properties and breathability. Its armless design allows for easy storage under desks, maximizing space. The chair includes a U-shaped metal backrest for lumbar support, a sturdy metal base, and 360° swivel rolling wheels for mobility. It is BIFMA-certified and supports a maximum weight of 250 pounds.



2. Setup and Assembly
The DUMOS Armless Home Office Desk Chair is designed for hassle-free assembly. All necessary accessories and tools are included in the package. Follow the easy-to-understand instructions, consisting of just 6 steps, to have your chair ready in approximately 10 minutes.
Assembly Steps:
- Unpack all components and verify against the parts list in the manual.
- Attach the five caster wheels to the chair base.
- Insert the gas lift cylinder into the center hole of the chair base.
- Secure the seat plate mechanism to the underside of the seat cushion using the provided screws.
- Attach the backrest to the seat cushion using the provided screws and frame.
- Place the assembled seat and backrest onto the gas lift cylinder.


Video demonstrating the assembly process of the DUMOS Armless Home Office Desk Chair, showing step-by-step instructions for putting the chair together.
3. Operating Instructions
The DUMOS Armless Home Office Desk Chair is designed for ease of use and adaptability to various tasks and users.
Height Adjustment:
To adjust the seat height, locate the lever under the seat on the right side. While seated, pull the lever up to lower the seat. To raise the seat, stand up slightly and pull the lever up. Release the lever at your desired height.
Swivel and Mobility:
The chair features a 360° swivel function and smooth-rolling wheels, allowing for effortless movement and rotation around your workspace. The armless design further enhances mobility and allows the chair to be tucked neatly under most desks when not in use.


Video showcasing the various functions of the DUMOS chair, including height adjustment, 360-degree swivel, and smooth rolling wheels.
4. Maintenance
To ensure the longevity and appearance of your DUMOS Armless Home Office Desk Chair, follow these simple maintenance guidelines:
- Cleaning: Wipe clean with a damp cloth. For tougher stains on the PU leather, use a mild soap solution and wipe dry immediately. Avoid harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all screws and connections to ensure they are tight. Re-tighten if necessary to maintain stability and safety.
- Wheels: Keep the caster wheels free of debris (hair, dust, etc.) to ensure smooth rolling.

5. Troubleshooting
If you encounter any issues with your DUMOS Armless Home Office Desk Chair, please refer to the following common troubleshooting tips:
- Chair Wobbles: Ensure all screws are securely tightened. Check that the chair is on a flat, even surface.
- Height Adjustment Not Working: Verify that the gas lift cylinder is correctly installed and the lever mechanism is not obstructed. If the issue persists, the gas lift may need replacement.
- Wheels Not Rolling Smoothly: Inspect the caster wheels for any trapped debris (hair, lint, etc.) and clean them thoroughly.
For further assistance, please contact DUMOS customer support.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | DUMOS |
| Model Name | DUMOS Armless Home Office Desk Chair |
| Model Number | H3-2193WT-14DU |
| Color | Beige White |
| Product Dimensions | 17.51"D x 18.11"W x 34.25"H |
| Seat Depth | 2.5 inches |
| Seat Height | Adjustable (17.71"-21.45" from floor) |
| Maximum Weight Recommendation | 250 Pounds |
| Material | Faux Leather, Metal (Sponge Fill) |
| Special Features | Adjustable Height, Ergonomic, Rolling, Space Saving, 360° Swivel |
| Assembly Required | Yes (6 steps, approx. 10 minutes) |
| Certifications | BIFMA Certified, SGS-certified cylinders |

7. Safety Information
Please observe the following safety guidelines for safe use of your DUMOS Armless Home Office Desk Chair:
- Do not exceed the maximum weight capacity of 250 lbs.
- Ensure proper assembly for stability before use.
- Use adjustable mechanisms with care to avoid injury.
- Keep hands and fingers clear of moving parts during height adjustment.
8. Warranty and Support
DUMOS stands behind the quality of its products. For specific warranty details, please refer to the documentation included with your purchase or visit the official DUMOS website. For any questions, concerns, or support needs, please contact DUMOS customer service through the contact information provided on our website or your purchase platform.





