Alphacool Radiator R27‑S240 240mm, 18 FPI, Copper Fins

The Alphacool Radiator R27‑S240 is a 240mm liquid‑cooling radiator featuring copper fins and an 18 FPI (fins per inch) density. Engineered for PC water‑cooling loops, this compact dual‑fan radiator is intended to dissipate heat from CPUs and GPUs while fitting in cases that support 240mm radiators. The copper fin construction ensures good thermal conductivity and long‑term durability in typical desktop environments.

Advantages

The radiator combines a slim 240mm form factor with an 18 FPI fin density to balance airflow resistance and heat transfer performance. Copper fins provide effective thermal conduction, improving the radiator's ability to move heat from coolant to air. Standard mounting spacing allows compatibility with a wide range of fans and case mounting points, making it suitable for both upgrades and custom loop builds.

Suitable for

• Compact dual‑fan CPU liquid‑cooling loops
• GPU water‑cooling setups in mid‑tower and compact cases
• PC builds requiring a 240mm radiator with moderate fin density
• Custom cooling loops where copper fin material is preferred

Key specifications

• Radiator length: 240 mm (dual‑fan configuration)
• Fin material: copper
• Fin density: 18 FPI (fins per inch)
• Design: slim profile suitable for 240mm mounting locations
• Compatibility: standard 120 mm fan mounts (2x)

How to use

Install the radiator in a case location that supports 240mm radiators, aligning the standard fan mounting holes with the case or fan brackets. Mount two compatible 120 mm fans to the radiator using appropriate screws, selecting push, pull, or push–pull configurations according to space and performance needs. Connect the radiator to your water‑cooling loop using suitable fittings and tubing; ensure correct flow direction and secure, leak‑free connections. After filling the loop, perform a leak test and run the pump to circulate coolant while monitoring temperatures until the system stabilizes.

Recommendations

Choose fans and pump strength that match the 18 FPI fin density: higher static pressure fans improve airflow through denser fins, while quieter low‑speed fans suit moderate cooling demands. Regularly inspect and maintain the loop, including periodic coolant replacement and cleaning of fins to sustain heat transfer efficiency.