Best 4 Inch Computer Fan in 2025
Updated on July 2025
#1
Recommended
Free Shipping
- Designed for efficient airflow, maintaining low temperatures for equipment.
- Compatible with standard 19” network cabinets; operates at AC 110V with airflow capability of 95/110CFM and speeds of 2600-2800rpm, while maintaining a noise level of 45dBA; includes a 6.2ft AC cable and a 9" ground wire.
- Suitable for various applications, including fan cooler panels, server trays, media cabinets, and computer cases; features overheat protection.
- Constructed with a durable steel frame and metal finger guard; easy installation with quick mount silicone rubber screws and self-tapping screws.
- Standard exhaust replacement dimensions: outer size of 4.75”x4.75" with a 4-inch hole spacing.
Read More
- Designed for efficient airflow, maintaining low temperatures for equipment.
- Compatible with standard 19” network cabinets; operates at AC 110V with airflow capability of 95/110CFM and speeds of 2600-2800rpm, while maintaining a noise level of 45dBA; includes a 6.2ft AC cable and a 9" ground wire.
Read More
#2
Value for Money
Free Shipping
- Energy-efficient inline duct fan operates at 4500 RPM, generating an airflow of 130 CFM with a maximum power consumption of 6W.
- Designed for quiet ventilation in various spaces such as grow rooms, bathrooms, kitchens, workshops, basements, and attics to enhance HVAC airflow.
- Constructed from high-quality plastic for durability; allows for quick removal and simple maintenance.
- Includes a variable speed controller to adjust airflow and noise levels according to preference.
- Duct size: 4 inches; dimensions: 7.28 x 3.82 x 3.82 inches; voltage: 100-240V; air pressure: 165 Pa; noise level: 26 dBA.
Read More
- Energy-efficient inline duct fan operates at 4500 RPM, generating an airflow of 130 CFM with a maximum power consumption of 6W.
- Designed for quiet ventilation in various spaces such as grow rooms, bathrooms, kitchens, workshops, basements, and attics to enhance HVAC airflow.
- Constructed from high-quality plastic for durability; allows for quick removal and simple maintenance.
Read More
#3
Free Shipping
- ❃❃ Made of high quality plastics with high end bearings, this cooling fan can run continuously for days at high speeds without hassle or concern.
- ❃❃ Size: Approx.120x120x25 mm/4.72x4.72x1 in; Speed: 3000RPM; Noise:37dBA; Rated Voltage :12V; Rated Current: 0.45A; Airflow: 92.3 ±10%CFM; Power: Slowest Speed: <2W, Full Speed: 4 W; Cable length: Approx 23cm/910in; Connecter: DC 5.5X2.1mm Female.
- ❃❃ A multi-speed controller makes it set the fan’s speed to optimal noise and airflow levels; lifespan: About 50,000 hrs, allows the fans to be laid flat or stand upright; The power adapter increases maximum fan speed and enables the fan to be powered through an AC outlet.
- ❃❃ Applies to: Xboxs, Playtations, Rokus, TVs, receivers, mondems, routers, DVRs, computers and other audio video electronics.
- ❃❃ Package Included: 2 * 120x25mm Cooling Fan; 2 * 3 to 12V Speed Controller.(❃❃ Any questions, you can contact us and we will give you a satisfied solution!).
Read More
- ❃❃ Made of high quality plastics with high end bearings, this cooling fan can run continuously for days at high speeds without hassle or concern.
- ❃❃ Size: Approx.120x120x25 mm/4.72x4.72x1 in; Speed: 3000RPM; Noise:37dBA; Rated Voltage :12V; Rated Current: 0.45A; Airflow: 92.3 ±10%CFM; Power: Slowest Speed: <2W, Full Speed: 4 W; Cable length: Approx 23cm/910in; Connecter: DC 5.5X2.1mm Female.
Read More
#4
38% Off
Free Shipping
- Speed adjustable for optimal cooling or quiet operation.
- Lifespan of 50,000 hours due to dual-ball bearings; connects directly to AC outlet for easy use.
- Versatile 120mm fan suitable for PCs, game consoles, and various appliances; ensures optimal operating temperature.
- Dimensions: 120 x 120 x 25 mm; rated voltage of 12V; airflow of 95.8 CFM; operates at 700 to 2800 RPM with low noise levels.
- Reliable customer support available for any product-related inquiries.
Read More
- Speed adjustable for optimal cooling or quiet operation.
- Lifespan of 50,000 hours due to dual-ball bearings; connects directly to AC outlet for easy use.
- Versatile 120mm fan suitable for PCs, game consoles, and various appliances; ensures optimal operating temperature.
- Dimensions: 120 x 120 x 25 mm; rated voltage of 12V; airflow of 95.8 CFM; operates at 700 to 2800 RPM with low noise levels.
Read More
#5
Free Shipping
- Nine blade design achieves a maximum speed of 1200 RPM for effective cooling performance
- Equipped with soft silicone cushions to minimize vibration and maintain noise levels at 32.1 dBA
- Hydraulic bearing enhances stability, reduces noise, and extends lifespan to an average of 30,000 hours
- 120 mm size ensures compatibility with all case types and allows for easy installation
- Made from PBT material for good insulation, heat resistance, and overall durability
Read More
- Nine blade design achieves a maximum speed of 1200 RPM for effective cooling performance
- Equipped with soft silicone cushions to minimize vibration and maintain noise levels at 32.1 dBA
- Hydraulic bearing enhances stability, reduces noise, and extends lifespan to an average of 30,000 hours
- 120 mm size ensures compatibility with all case types and allows for easy installation
Read More
#6
Free Shipping
- UL-certified cooling fan system with minimal noise production.
- Multi-speed controller for adjustable airflow and noise levels.
- Constructed from CNC machined aluminum with a brushed black finish.
- Compatible with wall outlet and USB power sources; Turbo Adapter boosts performance by 25%.
- Compact dimensions: 4.6 x 4.6 x 1.3 in.; airflow rating of 26 CFM; operates at 17 dBA noise level; equipped with dual ball bearings.
Read More
- UL-certified cooling fan system with minimal noise production.
- Multi-speed controller for adjustable airflow and noise levels.
- Constructed from CNC machined aluminum with a brushed black finish.
- Compatible with wall outlet and USB power sources; Turbo Adapter boosts performance by 25%.
Read More
#7
Free Shipping
- USB fans designed for cooling electronics and components while operating quietly.
- Adjustable speed controller for optimizing noise and airflow.
- Durable dual-ball bearings with a lifespan of 67,000 hours; can be positioned flat or upright.
- Powered via USB ports on AV electronics and game consoles.
- Compact size: 4.7 x 4.7 x 1 in. per fan; airflow of 104 CFM; noise level of 19 dBA.
Read More
- USB fans designed for cooling electronics and components while operating quietly.
- Adjustable speed controller for optimizing noise and airflow.
- Durable dual-ball bearings with a lifespan of 67,000 hours; can be positioned flat or upright.
- Powered via USB ports on AV electronics and game consoles.
- Compact size: 4.7 x 4.7 x 1 in. per fan; airflow of 104 CFM; noise level of 19 dBA.
#8
Free Shipping
- Automatic speed control via 4PIN PWM interface adjusts fan speed based on motherboard temperature, reaching a maximum of 1550 RPM.
- S-FDB bearings minimize blade shaking and noise while enhancing cooling efficiency and extending fan lifespan.
- Soft silicone corner pads reduce vibrations and friction, resulting in quiet operation during cooling tasks.
- Fan dimensions: 120x120x25mm, with a speed of 1550 RPM, noise level of 25.6 dBA, air pressure of 1.53mm H2O, and air flow of 66.17 CFM for effective cooling.
- Versatile use as both a case fan and CPU cooler, efficiently dissipating heat from the system to maintain optimal temperatures.
Read More
- Automatic speed control via 4PIN PWM interface adjusts fan speed based on motherboard temperature, reaching a maximum of 1550 RPM.
- S-FDB bearings minimize blade shaking and noise while enhancing cooling efficiency and extending fan lifespan.
- Soft silicone corner pads reduce vibrations and friction, resulting in quiet operation during cooling tasks.
Read More
#9
Free Shipping
- Suitable for cooling or ventilation projects, or for use as a replacement fan.
- Heavy-duty aluminum construction with power plug, fan guards, and mounting screws included.
- UL-certified with dual-ball bearings, offering a lifespan of 67,000 hours and flexible mounting options.
- Low-speed operation provides quieter performance compared to high-speed models of the same size.
- Dimensions: 120 x 120 x 38 mm; 100 to 120V AC; Airflow: 62 CFM; Noise level: 32 dBA; Speed: 1800 RPM.
Read More
- Suitable for cooling or ventilation projects, or for use as a replacement fan.
- Heavy-duty aluminum construction with power plug, fan guards, and mounting screws included.
- UL-certified with dual-ball bearings, offering a lifespan of 67,000 hours and flexible mounting options.
- Low-speed operation provides quieter performance compared to high-speed models of the same size.
Read More
#10
21% Off
Free Shipping
- Energy-efficient EC axial fan consumes less power compared to AC fans
- Designed for cooling and ventilation projects or as a replacement fan
- Dual-ball bearings provide a lifespan of 67,000 hours; can be positioned flat or upright
- Wiring is not pre-connected to the fan to accommodate various project needs
- Specifications: 80 x 80 x 25 mm, rated voltage 90V to 270V, airflow 43.6 CFM, power 2W, speed 2800 RPM; package includes fan, grill, mounting hardware, AC cord with switch (38 inches), and power plug
Read More
- Energy-efficient EC axial fan consumes less power compared to AC fans
- Designed for cooling and ventilation projects or as a replacement fan
- Dual-ball bearings provide a lifespan of 67,000 hours; can be positioned flat or upright
- Wiring is not pre-connected to the fan to accommodate various project needs
Read More
Similar Products
Msi 120mm Rgb Fan
See All
Silent Pc Fans 120mm Rgb
See All
Rgb Pc Fans Reverse
See All
