Noctua NA-FD1 Fan Duct Kit for NH-L9i/L9a CPU Coolers NA-FD1

he NA-FD1 fan duct kit makes it possible to significantly improve the performance of Noctua NH-L9i and NH-L9a series CPU coolers in Small Form Factor (SFF) environments where there is a gap of 5mm or more (up to 45mm) between the cooler and a perforated top or side panel. Bridging this gap; the duct prevents the cooler from taking in hot air from the interior and enables it to draw in fresh from the outside through the perforated panel; which can; depending on the setup; improve CPU temperatures by as much as 5°C or more. As the duct is assembled from EVA foam spacers of different thickness; it is fully modular and can be adjusted in 1mm increments from 5mm to 45mm height in order to fit various different cases and configurations. In short; the NA-FD1 is a simple yet smart; flexible; and cost-effective way of boosting the efficiency of NH-L9 series coolers!
Significant performance boost In tightly packed; ITX-based Small Form Factor builds; hot air can accumulate around the socket area. By enabling the NH-L9 cooler to draw in fresh air from the outside instead of hot interior air; adding the NA-FD1 can lead to huge performance gains of up to 5°C and more.
Compatible with NH-L9i and NH-L9a models The NA-FD1 is fully compatible with all variations of the NH-L9i (NH-L9i; NH-L9i chromax.black; NH-L9i-17xx; NH-L9i-17xx chromax.black) and NH-L9a (NH-L9a; NH-L9a-AM4; NH-L9a-AM4 chromax.black) series. It is not compatible with the NH-L9x65; NH-L9x65 SE-AM4 or other coolers.
Reduced intake noise compared to taller coolers When fans draw in air through perforated panels that are very close to their intake; high-pitched turbulence noises can occur. With the NA-FD1; the NH-L9’s fan has at least 5mm (and up to 45mm) of breathing space; which yields a smoother sound signature compared to taller coolers that may struggle with intake noise issues due to low clearance.

Ideal for cases with 42-82mm clearance Consisting of 7 foam spacers from 10 to 3mm thickness; the NA-FD1 can be adjusted from 5mm to 45mm in 1mm increments. As such; it is ideal for bridging the gap between the 37mm high NH-L9 coolers and perforated side or top panes of cases that offer between 42 and 82mm clearance such as the popular Dan A4-SFX (48mm) or the Louqe Ghost S1 (66mm).
Adjustable and reusable The NA-FD1 set consists of 7 Ethylene-Vinyl Acetate (EVA) foam spacers with different thicknesses (2x 10; 7; 6; 5; 4; 3mm) that can be stacked to bridge gaps of different sizes. If you decide to switch to a different case or configuration that has more or less clearance; you can simply adjust the duct by adding or removing spacers.
Easy installation Installing the NA-FD1 is a breeze: Simply measure the gap between the cooler and the panel; select the corresponding foam spacers; replace the original fan screws with the supplied bolts; stick the plastic tubes to the bolts; add the foam spacers; cut the tubes to the appropriate length and you’re ready to go!