---
product_id: 291879660
title: "NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler"
brand: "noctua"
price: "₨15232"
currency: LKR
in_stock: true
reviews_count: 8
category: "Noctua"
url: https://www.desertcart.lk/products/291879660-na-fk1-redux-second-fan-upgrade-kit-for-nh-u12s
store_origin: LK
region: Sri Lanka
---

# Whisper-quiet at idle PWM auto speed control Lowers temps by 1-3°C NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler

**Brand:** noctua
**Price:** ₨15232
**Availability:** ✅ In Stock

## Summary

> ❄️ Cool smarter, not louder — upgrade your airflow game!

## Quick Answers

- **What is this?** NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler by noctua
- **How much does it cost?** ₨15232 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/291879660-na-fk1-redux-second-fan-upgrade-kit-for-nh-u12s)

## 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

- • **Built to Last:** Crafted from fibre-glass reinforced PBT and backed by a 6-year warranty, this fan upgrade is a durable investment in your system’s longevity.
- • **Silent Efficiency:** Run both fans at lower speeds for near-silent operation without sacrificing airflow, thanks to included Low-Noise Adaptors.
- • **Smart Speed Control:** Enjoy seamless automatic fan speed adjustments via PWM, optimizing cooling under load and minimizing noise at idle.
- • **Complete Upgrade Kit:** Includes everything you need—NF-P12 redux-1700 PWM fan, anti-vibration pads, mounting clips, PWM y-cable, and noise adapters for hassle-free installation.
- • **Dual-Fan Push/Pull Power:** Transform your NH-U12S Redux into a high-performance cooling beast with a push/pull setup that slashes CPU temps by up to 3°C.

## Overview

The Noctua NA-FK1 Redux is a premium second fan upgrade kit designed to enhance the NH-U12S Redux cooler with a push/pull dual-fan configuration. It reduces CPU temperatures by 1-3°C, especially under heavy loads, while maintaining whisper-quiet operation through PWM speed control and Low-Noise Adaptors. The kit includes a high-quality NF-P12 redux-1700 PWM fan, anti-vibration pads, mounting clips, a 4-pin PWM y-cable, and noise reduction accessories, all built with durable fibre-glass reinforced PBT and backed by a 6-year warranty.

## Description

Buy Noctua NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler: Case Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good kit if you are looking to further decrease your temps - I bought this fan in addition to the NH-U12S cooler, with the single fan the cooler comes with my temps were around 38-45 at idle and around 60-65c under load. With this fan installed in a push-pull configuration, it dropped to around 35-40 at idle and around 50-60 under load. So for $16, it did help to drop my temps a few degrees, which i think is well worth it. It was just as easy to install as the original fan the cooler came with, the only really difference was that the anti vibration pads on this kit were a little thicker than the original fan, but this didn’t make any difference in the install or operation. Noise wise, it is a slight bit louder with this additional fan, but not enough to make a noticeable difference and bother me. It does come with adapters to reduce the noise if you need them, but it’s at the cost of fan speed, so i ended up not using them. Happy with my Noctua products so far, and ill for sure be using them again for any future cooling i may need
Review: fan good, actually - Love Noctua, simple as. I got a Noctua NH-U12S Redux for my 5600X a couple of years ago, and stumbled into a 5800x3d. It runs a little hotter, and the UH12S only has one fan, so I got the second one to go with it. Works like a charm... once I figured out how to mount it

## Features

- Upgrades the NH-U12S redux to a push/pull dual-fan configuration for improved performance or lower noise levels when running both fans at lower speed
- Can reduce temperatures by 1-3°C, especially on higher heat-loads such as during turbo use, on overclocked systems or higher TDP processors
- Second high-quality NF-P12 redux-1700 PWM fan supports automatic speed control via the motherboard, can provide massive airflow at load and run whisper-quiet at idle
- Low-Noise Adaptors allow the maximum fan speed to be reduced from 1700 to 1300rpm for near-silent operation
- Includes 1x NF-P12 redux-1700 PWM fan, 4 anti-vibration pads, 1 pair of fan mounting clips, 1x 4-pin PWM y-cable and 2x Low-Noise Adaptors

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08WQ6HT24 |
| Best Sellers Rank | #264,928 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,397 in Computer Case Fans #1,881 in Kids' Play Trucks #44,172 in Camping & Hiking Equipment |
| Brand | Noctua |
| Brand Name | Noctua |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Customer Reviews | 4.8 out of 5 stars 956 Reviews |
| Included Components | 1 product |
| Item Dimensions L x W x H | 6.06"L x 5.47"W x 1.93"H |
| Item Weight | 0.1 Kilograms |
| Manufacturer | Noctua |
| Material Type | Fibre-glass reinforced PBT |
| Maximum Rotational Speed | 1700 RPM |
| Power Connector Type | 4-Pin |
| Product Dimensions | 6.06"L x 5.47"W x 1.93"H |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 6 year manufacturer’s warranty |

## Product Details

- **Brand:** Noctua
- **Compatible Devices:** Desktop
- **Cooling Method:** Air
- **Manufacturer:** Noctua
- **Material:** Fibre-glass reinforced PBT
- **Maximum Rotational Speed:** 1700 RPM
- **Number of Items:** 1
- **Power Connector Type:** 4-Pin
- **Product Dimensions:** 6.06"L x 5.47"W x 1.93"H
- **Voltage:** 12 Volts

## Images

![NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler - Image 1](https://m.media-amazon.com/images/I/81L6v6TLrpL.jpg)

## Questions & Answers

**Q: Would these fan clips work for the u12p? I have the heat sync but no fan clips. Since im not the original owner I cannot get them from noctua.**
A: Since this was designed as an add on fan for the Noctua NH-U12S redux cooler, the clips will be compatible with the other Noctua NH-U12S coolers.  Diagrams of these coolers can be found at the Noctua website showing the exact dimensions.

**Q: Does the fan have a cfm rating?  (i don't see cfm on noctua.at specs)**
A: This is a replacement part for the u12s cooler which commonly has a fan of a cfm rating of 70.60 so I'm guessing that's it

**Q: Hi,does it work with cooler master hyper 212 evo ??**
A: yeah but you'll need the brackets that came with the 212

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good kit if you are looking to further decrease your temps
*by E***C on December 11, 2022*

I bought this fan in addition to the NH-U12S cooler, with the single fan the cooler comes with my temps were around 38-45 at idle and around 60-65c under load. With this fan installed in a push-pull configuration, it dropped to around 35-40 at idle and around 50-60 under load. So for $16, it did help to drop my temps a few degrees, which i think is well worth it. It was just as easy to install as the original fan the cooler came with, the only really difference was that the anti vibration pads on this kit were a little thicker than the original fan, but this didn’t make any difference in the install or operation. Noise wise, it is a slight bit louder with this additional fan, but not enough to make a noticeable difference and bother me. It does come with adapters to reduce the noise if you need them, but it’s at the cost of fan speed, so i ended up not using them. Happy with my Noctua products so far, and ill for sure be using them again for any future cooling i may need

### ⭐⭐⭐⭐⭐ fan good, actually
*by S***N on August 10, 2025*

Love Noctua, simple as. I got a Noctua NH-U12S Redux for my 5600X a couple of years ago, and stumbled into a 5800x3d. It runs a little hotter, and the UH12S only has one fan, so I got the second one to go with it. Works like a charm... once I figured out how to mount it

### ⭐⭐⭐⭐⭐ Excellent
*by M***T on January 24, 2026*

Quite efficient and silent. Coupled with another fan of the same, this has been a great purchase. Considering I work and spend most of my time in a room quite hot, while I still play demanding games, I never noticed overheating.

## Frequently Bought Together

- Noctua NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler
- ARCTIC MX-4 (4 g) - Premium Performance Thermal Paste for All Processors (CPU, GPU - PC), Very high Thermal Conductivity, Long Durability, Safe Application, Non-Conductive

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-26*