Thermalright unveils slim new 140mm case fans

Thermalright is expanding its already vast cooling catalogue with a rare entry into the slim 140mm fan market. The newly unveiled TL-B14015 series targets the growing niche of Small Form Factor (SFF) enthusiasts who require the surface area of a 140 mm fan but lack the clearance for standard 25-mm-thick fans. Measuring just 15 mm thick, these fans are designed to slide into tight gaps behind front panels or beneath bottom-mounted radiators where traditional blowers won't fit.

Currently available in a stealthy black finish, the standard TL-B14015 (via CowCotland) operates at a modest 1600 RPM, delivering 62.8 CFM of airflow and 1.0 mmH2O of static pressure while keeping noise levels very respectable at 24.6 dBA.

For those who prioritise raw performance over acoustic stealth, Thermalright has also introduced the TL-B14015 Extrem. This “Extrem” variant is distinguished by a structural gold ring connecting the blade tips. Moving away from standard plastics, the Extrem model utilises Liquid Crystal Polymer (LCP) blades. The performance jump is significant, with the Extrem pushing up to 2600 RPM, doubling the static pressure of the base model to 2.01 mmH2O and increasing airflow to 92.3 CFM. However, as one might expect from a slim fan spinning at such high velocities, the noise level climbs to 34.2 dBA.

Both versions of the TL-B14015 use a dual-row ball bearing system, which generally offers a longer lifespan than sleeve or fluid-dynamic bearings. Thermalright also includes a fairly robust accessory bundle for a standalone fan, including a protective metal grille with a colour-matched centre, mounting screws, and a PWM splitter for dual-fan configurations. This launch effectively positions Thermalright as a direct competitor to the few premium slim 140mm options on the market, likely at a price point that makes it the default choice for budget-conscious SFF builders.

KitGuru says: Thermalright continues to be a menace to the high-priced cooling establishment. Bringing LCP blades and a 2600 RPM ceiling to a 15mm-thick 140mm fan is an impressive technical feat, provided you don't mind the turbine-like acoustics at full power.

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