--- product_id: 383387179 title: "NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black)" brand: "noctua" price: "$37.55" currency: USD in_stock: true reviews_count: 13 category: "Noctua" url: https://www.desertcart.us/products/383387179-na-fd1-fan-duct-kit-for-nh-l9i-and-nh store_origin: US region: United States of America --- # Easy install with included bolts Modular EVA foam spacers 5-45mm Up to 5°C cooler CPU temps NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) **Brand:** noctua **Price:** $37.55 **Availability:** ✅ In Stock ## Summary > ❄️ Elevate your SFF build with precision airflow and silent cooling mastery! ## Quick Answers - **What is this?** NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) by noctua - **How much does it cost?** $37.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/383387179-na-fd1-fan-duct-kit-for-nh-l9i-and-nh) ## Best For - noctua enthusiasts ## Why This Product - Trusted noctua brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Chill Like a Pro:** Slash CPU temps by up to 5°C by drawing fresh air directly from outside your case. - • **Tailored Fit, Every Time:** Adjustable EVA foam spacers in 1mm increments from 5 to 45mm for perfect compatibility with popular SFF cases. - • **Whisper-Quiet Performance:** Reduces intake turbulence noise by providing optimal fan breathing space. - • **Plug & Play Cooling Upgrade:** Straightforward installation with all necessary hardware included—no guesswork, just cool results. - • **Built to Last, Backed to Trust:** Premium Noctua quality with a reassuring 6-year manufacturer’s warranty. ## Overview The Noctua NA-FD1 Fan Duct Kit is a modular, EVA foam spacer system designed to bridge gaps between NH-L9i/a series CPU coolers and perforated case panels. Adjustable from 5 to 45mm in 1mm increments, it enables coolers to intake fresh outside air, improving CPU temperatures by up to 5°C while reducing fan noise. Compatible with popular small form factor cases like Dan A4-SFX and Louqe Ghost S1, it offers easy installation and is backed by Noctua’s trusted 6-year warranty. ## Description Product Description The 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 air 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 thicknesses, 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! 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, NH-L9a-AM5, NH-L9a-AM5 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 33-65mm 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! 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. Specifications Scope of delivery 7x foam spacers (10mm (2x), 7mm, 6mm, 5mm, 4mm, 3mm) 16x plastic tubes 4x steel bolts Cooler Compatibility NH-L9i, NH-L9i chromax.black, NH-L9i-17xx, NH-L9i-17xx chromax.black, NH-L9a-AM4, NH-L9a-AM4 chromax.black, NH-L9a-AM5, NH-L9a-AM5 chromax.black Review: Great results - Had Jonsbo NV10 case and with Noctua CPU cooler left slightly less than 5mm clearance. Took a chance on this kit. You could get away with just fitting 5mm spacer without tubes but cut tubes slightly less than securing "bolts". Push on lid of case fitted but only just. The results were better than I thought. Noise levels dropped dramatically and Fan speed dropped from around 1800rpm(idle) to 1600rpm with mid load. CPU temps dropped by about 15° Review: Super easy to install, seems to work well! - I didn't follow the installation instructions to the letter - i.e. measuring the distance between the cooler and the side of the case to get a precise fit; just did it by eye instead -- and it was as snug without pushing on the side plate too much. Lots of different sized pieces of foam will definitely help with re-use with other cases, if that should come to pass. ## Features - Bridges the gap between the fan and perforated case panels in order to enable the cooler to draw in fresh air from the outside for improved cooling performance (up to 5°C and more) - Modular system made from EVA foam spacers, adjustable from 5 to 45mm in 1mm increments, ideal for popular SFF cases (e.g. Dan A4-SFX, Loque Ghost S1) - Compatible with NH-L9i (chromax.black), NH-L9i-17xx (chromax.black) NH-L9a, NH-L9a-AM5 (chromax.black) and NH-L9a-AM4 (chromax.black) - Easy, straightforward installation procedure - Trusted Noctua quality backed up by a 6-year manufacturer’s warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09HKXRQCD | | Best Sellers Rank | 17,857 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 84 in Computer Cases | | Brand | Noctua | | Compatible Devices | Desktop | | Compatible devices | Desktop | | Cooling Method | Air | | Cooling method | Air | | Country Of Origin | Taiwan | | Customer Reviews | 4.5 out of 5 stars 479 Reviews | | EU Spare Part Availability Duration | 6 Years | | Included Components | EVA foam spacers, installation manual, warranty card | | Item Dimensions L x W x H | 12L x 9.9W x 4.8H centimetres | | Item Weight | 54 Grams | | Manufacturer | Noctua | | Manufacturer Part Number | NA-FD1 | | Material | EVA foam | | Model Number | NA-FD1 | | Number of Items | 1 | | Product Warranty | 1 Year Manufacturer | | Product dimensions | 12L x 9.9W x 4.8H centimetres | | Unit Count | 1.0 count | ## Product Details - **Brand:** Noctua - **Colour:** Black - **Compatible devices:** Desktop - **Included components:** 1 piece - **Item weight:** 54 Grams - **Number of batteries:** 12V batteries required. - **Number of channels:** 8 - **Product dimensions:** 12D x 9.9W x 4.8H centimetres - **Special feature:** Fresh Air Intake - **Water resistance level:** Not Water Resistant ## Images ![NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 1](https://m.media-amazon.com/images/I/917P7J06uBL.jpg) ![NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 2](https://m.media-amazon.com/images/I/715+FyWhrqL.jpg) ![NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 3](https://m.media-amazon.com/images/I/71KErsgtnNL.jpg) ![NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 4](https://m.media-amazon.com/images/I/81ntQAIR2pL.jpg) ![NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 5](https://m.media-amazon.com/images/I/81R9vXQ-4tL.jpg) ## Questions & Answers **Q: What size are these.? 140 mm 120 mm etc?** A: They are for 92 mm fans -- like on the NH-9Li, NH-9La, or NH-9x65/ **Q: Is there a model for 120mm fans?** A: The Fan Duct Kit was specifically for the NH-L9 CPU Coolers which are low profile. Haven't seen a 120mm version. The Fan Duct works very well on the NH-L9 coolers, sealing out warm air from inside the case and only allowing the cooler outside air in. I have a tiny AMD build in a 4 liter case, and the Duct kit helps keep CPU Temps in the 95 degrees (39C) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great results *by P***V on 15 March 2025* Had Jonsbo NV10 case and with Noctua CPU cooler left slightly less than 5mm clearance. Took a chance on this kit. You could get away with just fitting 5mm spacer without tubes but cut tubes slightly less than securing "bolts". Push on lid of case fitted but only just. The results were better than I thought. Noise levels dropped dramatically and Fan speed dropped from around 1800rpm(idle) to 1600rpm with mid load. CPU temps dropped by about 15° ### ⭐⭐⭐⭐⭐ Super easy to install, seems to work well! *by T***R on 12 April 2022* I didn't follow the installation instructions to the letter - i.e. measuring the distance between the cooler and the side of the case to get a precise fit; just did it by eye instead -- and it was as snug without pushing on the side plate too much. Lots of different sized pieces of foam will definitely help with re-use with other cases, if that should come to pass. ### ⭐⭐⭐⭐⭐ Phenomenal for tiny cases *by P***. on 23 January 2025* Phenomenal product if you’re using a very small PC case. My case is a sandwich ITX that’s sub 7ltrs and it dropped the temps of my 7600 from high 80’s to low 70’s. ## Frequently Bought Together - Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Noctua NF-A9x14 HS-PWM chromax.Black.swap, Premium Quiet Slim Fan, 4-Pin (92x14mm, Black) - Thermalright AXP90 X47 Full Low Profile CPU Cooler, 47mm Height, with TL-9015R Slim PWM CPU Fan,Pure Copper Version, Computer ITX Heatsink Cooler, for AMD:AM4 AM5/Intel 1150/1151/1200/1700 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/383387179-na-fd1-fan-duct-kit-for-nh-l9i-and-nh](https://www.desertcart.us/products/383387179-na-fd1-fan-duct-kit-for-nh-l9i-and-nh) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-08*