---
product_id: 379138111
title: "Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black)"
brand: "noctua"
price: "€ 27.02"
currency: EUR
in_stock: true
reviews_count: 13
category: "Noctua"
url: https://www.desertcart.fr/products/379138111-noctua-na-fd1-fan-duct-kit-for-nh-l9i-nh
store_origin: FR
region: France
---

# Adjustable 5-45mm foam spacers Up to 5°C cooler temps Easy modular installation Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black)

**Brand:** noctua
**Price:** € 27.02
**Availability:** ✅ In Stock

## Summary

> 🌬️ Elevate your small form factor cooling game — because every degree counts!

## Quick Answers

- **What is this?** Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) by noctua
- **How much does it cost?** € 27.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/379138111-noctua-na-fd1-fan-duct-kit-for-nh-l9i-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

- • **Effortless Setup:** Modular design with straightforward installation means less time building, more time dominating.
- • **Trusted Durability:** Backed by Noctua’s legendary 6-year warranty — reliability that professionals demand.
- • **Custom Fit Flexibility:** Adjustable EVA foam spacers from 5 to 45mm in 1mm increments tailor airflow perfectly to your SFF case.
- • **Seamless Compatibility:** Designed exclusively for Noctua NH-L9i and NH-L9a series coolers, ensuring flawless integration.
- • **Precision Cooling Boost:** Lowers CPU temps by up to 5°C for peak performance in compact builds.

## Overview

The Noctua NA-FD1 Fan Duct Kit enhances cooling efficiency for NH-L9i and NH-L9a CPU coolers by channeling fresh air through perforated case panels. Featuring adjustable EVA foam spacers from 5 to 45mm, it fits popular small form factor cases like Dan A4-SFX and Loque Ghost S1. Installation is simple and modular, backed by Noctua’s 6-year warranty, delivering up to 5°C lower CPU temperatures for optimized performance in compact PC builds.

## Description

Buy Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black): CPU Cooling Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: it works reducing temp 12 degrees f, not ready for 25mm fan - A lot of extra tubes come with this, so my first thought is that I can use it for two computers, but it only comes with 4 of the thumb screw things that you push the pipes down over, so once you've installed one, the lack of more thumb screw things means all the extra foam and pipe you still have are useless. I bet Noctua would send me more if I asked. Also, the screws you get are not compatible with the 25mm NFA9x25 fan that the nhl9i cooler itself is ready for, even including screws with it for that. To clarify, the nhl9i comes with longer screws that you can utilize if you want to swap the NFA9x15 fan that comes with it for a better NFA9x25, provided you have the clearance for it and have purchased said fan separately. These screws however, just like the ones that come on the preinstalled NFA9x15, are not the thumb screw type and won't work for a way to hold the pipes in this duct kit. The duct kit comes with 4 screws, one for each corner. You are to replace the preinstalled screws on the NFA9x15 with these. Once screws are installed, they protrude above the frame of the fan slightly, and the pipes in this kit slide down over those and friction holds them there. So what I have been trying to say is the longer version of the thumb screws for NFA9x25 are not included in this kit, so you'd probably have to ask Noctua for those. Now, once the pipes are installed, you shove the foam pieces down over the pipes, with the pipes coming up through the matching holes on each foam piece. Make sure the thickest piece is the one that ends up on top. From what I can figure, they normally recommend you stick a tooth pick through the grill over the fan and touch one corner of the fan and then mark the toothpick for the height, and then use that to determine the height your foam pieces must achieve. However, Inwin Chopin Max case has holes too small for that, so I put the thickest piece on the fan and just piled the biggest pieces remaining on top of that and carefully laid the side panel in place until I could feel that I had to press down slightly to make it touch against the case the way it will have to be when properly installed. Then, I sat the stack of foam I ended up with to one side and I pressed 4 straws down, one on each thumb screw. Now take the thinnest of the foam pieces I ended up setting aside earlier and press it down on the pipes all the way down till it's against the fan. Now take the next thinnest piece and depress it until it lays against the first piece. Rense and repeat until all pieces are installed. Now, in theory, you can just press down on the top piece and cut the pipe with scissors. I didn't like the chance of cutting the foam though, so I removed the top piece and cut the tube off protruding just a bit, maybe a little more than a quarter of an inch, above the next foam piece that was still installed. My scissors cut the pipes easily. Once cut, I put the top, thickest, foam piece back on. Always make sure the thickest foam piece that is in the kit is on top. The reason for this is added durability plus it lets you cut the pipes a fair bit short but the foam piece will still be held in place. This is so that you can know the hard plastic pipes won't be pressing against the side panel once the soft foam has compressed a little. Now to geek out with this. As it turns out, I built two Chopin Max computers at the same time. Intel 12400, Noctua NHL9i-17xx, AsRock b660m-ITX AC, 32gb Teamgroup G-Force Vulcan, 1tb wd blue sn580. I bought duct kits for both but chose to install only one first. After completing the builds, I did burn-in tests on both machines. AT first, I was kind of disappointed to find the temp hovering at 154f on both computers while running the CPUZ stress test, exactly the same temp, 154.8f. But then I happened to notice the fan on the ducted one was running at 2270rpm, and the one on the unducted system was running at its max 2550rpm. Once I used Fan Ctrl to force the fans to both run at 80 percent capacity, the unducted system proceeded to gradually warm up until it was at about 170f, where the ducted one stayed right around 158f. To be sure, I ran the same test again once the duct kit was installed on the second system, both now ducted, and they were within a degree of each other's temp.
Review: Does the job - Easy to install and it actually did lower my temperatures in my SFF case quite a bit. I didn’t take actual measurements but my estimate is probably between 3-5°C cooler.

## 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 |
| Batteries | 12V batteries required. |
| Best Sellers Rank | #206 in Computer CPU Cooling Fans #243 in Computer Cases |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (469) |
| Date First Available | November 4, 2021 |
| Item Weight | 1.9 ounces |
| Item model number | NA-FD1 |
| Manufacturer | Noctua |
| Other display features | Wireless |
| Product Dimensions | 4.72 x 3.9 x 1.89 inches |
| Special features | NA-FD1 |
| Whats in the box | EVA foam spacers, installation manual, warranty card |

## Product Details

- **Brand:** Noctua
- **Color:** Black
- **Compatible Devices:** Personal Computer
- **Included Components:** EVA foam spacers, installation manual, warranty card
- **Item Weight:** 54 Grams
- **Number of Batteries:** 12V batteries required.
- **Number of Channels:** 8
- **Product Dimensions:** 4.72"D x 1.88"W x 3.89"H
- **Special Feature:** NA-FD1
- **Water Resistance Level:** Not Water Resistant

## Images

![Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 1](https://m.media-amazon.com/images/I/31XjpIhUazL.jpg)
![Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 2](https://m.media-amazon.com/images/I/31g+ruJKfiL.jpg)
![Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 3](https://m.media-amazon.com/images/I/41hHXjn9mBL.jpg)
![Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 4](https://m.media-amazon.com/images/I/41tJoJTjelL.jpg)
![Noctua NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black) - Image 5](https://m.media-amazon.com/images/I/41thFj4hf7L.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

### ⭐⭐⭐⭐⭐ it works reducing temp 12 degrees f, not ready for 25mm fan
*by A***N on January 19, 2024*

A lot of extra tubes come with this, so my first thought is that I can use it for two computers, but it only comes with 4 of the thumb screw things that you push the pipes down over, so once you've installed one, the lack of more thumb screw things means all the extra foam and pipe you still have are useless. I bet Noctua would send me more if I asked. Also, the screws you get are not compatible with the 25mm NFA9x25 fan that the nhl9i cooler itself is ready for, even including screws with it for that. To clarify, the nhl9i comes with longer screws that you can utilize if you want to swap the NFA9x15 fan that comes with it for a better NFA9x25, provided you have the clearance for it and have purchased said fan separately. These screws however, just like the ones that come on the preinstalled NFA9x15, are not the thumb screw type and won't work for a way to hold the pipes in this duct kit. The duct kit comes with 4 screws, one for each corner. You are to replace the preinstalled screws on the NFA9x15 with these. Once screws are installed, they protrude above the frame of the fan slightly, and the pipes in this kit slide down over those and friction holds them there. So what I have been trying to say is the longer version of the thumb screws for NFA9x25 are not included in this kit, so you'd probably have to ask Noctua for those. Now, once the pipes are installed, you shove the foam pieces down over the pipes, with the pipes coming up through the matching holes on each foam piece. Make sure the thickest piece is the one that ends up on top. From what I can figure, they normally recommend you stick a tooth pick through the grill over the fan and touch one corner of the fan and then mark the toothpick for the height, and then use that to determine the height your foam pieces must achieve. However, Inwin Chopin Max case has holes too small for that, so I put the thickest piece on the fan and just piled the biggest pieces remaining on top of that and carefully laid the side panel in place until I could feel that I had to press down slightly to make it touch against the case the way it will have to be when properly installed. Then, I sat the stack of foam I ended up with to one side and I pressed 4 straws down, one on each thumb screw. Now take the thinnest of the foam pieces I ended up setting aside earlier and press it down on the pipes all the way down till it's against the fan. Now take the next thinnest piece and depress it until it lays against the first piece. Rense and repeat until all pieces are installed. Now, in theory, you can just press down on the top piece and cut the pipe with scissors. I didn't like the chance of cutting the foam though, so I removed the top piece and cut the tube off protruding just a bit, maybe a little more than a quarter of an inch, above the next foam piece that was still installed. My scissors cut the pipes easily. Once cut, I put the top, thickest, foam piece back on. Always make sure the thickest foam piece that is in the kit is on top. The reason for this is added durability plus it lets you cut the pipes a fair bit short but the foam piece will still be held in place. This is so that you can know the hard plastic pipes won't be pressing against the side panel once the soft foam has compressed a little. Now to geek out with this. As it turns out, I built two Chopin Max computers at the same time. Intel 12400, Noctua NHL9i-17xx, AsRock b660m-ITX AC, 32gb Teamgroup G-Force Vulcan, 1tb wd blue sn580. I bought duct kits for both but chose to install only one first. After completing the builds, I did burn-in tests on both machines. AT first, I was kind of disappointed to find the temp hovering at 154f on both computers while running the CPUZ stress test, exactly the same temp, 154.8f. But then I happened to notice the fan on the ducted one was running at 2270rpm, and the one on the unducted system was running at its max 2550rpm. Once I used Fan Ctrl to force the fans to both run at 80 percent capacity, the unducted system proceeded to gradually warm up until it was at about 170f, where the ducted one stayed right around 158f. To be sure, I ran the same test again once the duct kit was installed on the second system, both now ducted, and they were within a degree of each other's temp.

### ⭐⭐⭐⭐⭐ Does the job
*by A***E on October 18, 2025*

Easy to install and it actually did lower my temperatures in my SFF case quite a bit. I didn’t take actual measurements but my estimate is probably between 3-5°C cooler.

### ⭐⭐⭐⭐⭐ it really works!
*by J***N on October 2, 2025*

Got this bundled with the Noctua cooler I bought for $2 more, so figured it was worth a shot even if it didn't work. After installing them to bridge the 25mm gap between the fan and case, it dropped my CPU temps 5-10 degrees on average running the same benchmark before and after.

## 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

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-01-27*