- Reverse-blade rotor orientation maintains unobstructed intake aesthetics on front and bottom chassis mounts
- Fluid Dynamic Bearing yields up to 77.34 CFM of airflow and 2.52 mmH2O static pressure
- Modular pin-interlocking daisy-chain system drastically reduces enclosure cable clutter
- FLEX Receiver centralizes PWM speed reporting and wireless dual-zone RGB illumination
- Full acoustic load reaches 29.8 dBA when running at maximum 2100 RPM ceiling
- Each FLEX Receiver module is limited to managing a cluster of up to four daisy-chained fans
Overview
Aerodynamic intake paths dictate the mechanical structure of reverse-pitch cooling assemblies, where inverted impellers draw air inward without exposing rear frame supports or motor hubs to visible chassis windows. Operating within a 4.72 in (120 mm) footprint, this reverse-blade unit integrates a fluid dynamic bearing capable of rotating up to 2100 RPM to generate 77.34 CFM of airflow alongside 2.52 mmH2O of static pressure. The physical structure centers on an interlocking modular daisy-chain architecture accented by an aluminum-style center nameplate on the hub, linking adjacent frames via contact pins to replace discrete wire runs between fans with direct mechanical and electrical coupling.
Signal transmission, 4-pin PWM speed reporting, and 5V 3-pin ARGB distribution route through a dedicated FLEX Receiver module that synchronizes up to four interlocked units per receiver. Software management via the L-Connect 3 and L-Wireless ecosystem provides granular manipulation over two independent lighting zones—spanning the fan blades and peripheral side diffusers—as well as custom fan curve mapping. Operationally, the fluid dynamic bearing dampens rotational friction across low-to-mid speeds, while maximum load at 2100 RPM stabilizes at a measured acoustic threshold of 29.8 dBA, pairing quiet everyday operation with sufficient pressure for filtered intake chambers.
Technical Specifications
| Brand | Lian Li |
| Model | UNI Fan CL Flex 120 Reverse Blade |
| Fan Dimensions | 4.72 x 4.72 in (120 x 120 mm) |
| Blade Orientation | Reverse blade |
| Bearing Type | Fluid Dynamic Bearing (FDB) |
| Maximum Rotational Speed | 2100 RPM |
| Maximum Airflow | 77.34 CFM |
| Maximum Static Pressure | 2.52 mmH2O |
| Acoustic Noise Level | 29.8 dBA |
| Lighting Configuration | Dual-zone RGB (independent blade and side light strip control) |
| Hub Accent | Aluminum-style center nameplate |
| Interconnect Mechanism | Modular interlocking daisy-chain |
| Power Interface | 4-pin PWM |
| Lighting Interface | 5V 3-pin ARGB |
| Control Ecosystem | L-Connect 3 / L-Wireless |
| Receiver Module | FLEX Receiver (supports up to 4 fans per receiver) |
Primary Sources & Audited Citations
Recommended Alternatives in Case Fans
At a Glance
How reliable is the Lian Li UNI Fan CL Flex 120 Reverse Blade Review: Modular Interconnects and Inverted Airflow according to Mizex audits?
A prime choice for airflow-conscious builders seeking clean intake aesthetics and minimal wiring, provided the four-fan receiver clustering matches the planned case layout.
What are the known quirks or drawbacks of the Lian Li UNI Fan CL Flex 120 Reverse Blade Review: Modular Interconnects and Inverted Airflow?
Our reliability audit identified the following documented caveats:
- Full acoustic load reaches 29.8 dBA when running at maximum 2100 RPM ceiling
- Each FLEX Receiver module is limited to managing a cluster of up to four daisy-chained fans
What are the key engineering highlights of the Lian Li UNI Fan CL Flex 120 Reverse Blade Review: Modular Interconnects and Inverted Airflow?
The top strengths recorded in our evaluation include:
- Reverse-blade rotor orientation maintains unobstructed intake aesthetics on front and bottom chassis mounts
- Fluid Dynamic Bearing yields up to 77.34 CFM of airflow and 2.52 mmH2O static pressure
- Modular pin-interlocking daisy-chain system drastically reduces enclosure cable clutter
- FLEX Receiver centralizes PWM speed reporting and wireless dual-zone RGB illumination