Whats the cfm of this fan?

The output, converted from 9.4 m3/h is just 5.5 cfm, very low indeed.

What is the mtbf. How many hours of life can I expect from one of these?

Not sure about the Mtbf, but i purchased 2 of this in Jan 2020, and they have been running 24/7 till now with no problems. Installed them in my 2 poe+ switches

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Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

Product ID: 93385299

Details

Air flow capacity
9.4 Cubic Per
Brand
Noctua
Compatible devices
Desktop Server
Cooling method
Air
Material
Plastic
Maximum rotational speed
4400 RPM

🌀4400 RPM max speed

🔇14.9 dB ultra-quiet

❄️9.4 m³/h airflow

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AR$157152

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Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Stay cool, stay ahead — silent power in a compact frame!

TURBO AIRFLOW - Delivers 9.4 cubic meters per hour for efficient heat dissipation
COMPACT POWERHOUSE - 40x40x20mm size fits tight 1U spaces and network gear seamlessly
WHISPER QUIET COOLING - Advanced acoustic optimization keeps noise at a barely-there 14.9 dB
TRUSTED BRAND EXCELLENCE - Noctua’s award-winning A-series design ensures premium reliability and performance
ALL INCLUSIVE MOUNTING KIT - Comes with anti-vibration mounts, screws, extension cable, and Omnijoin adapter for effortless installation

The Noctua NF-A4x20 FLX is a premium 40mm computer case fan engineered for tight spaces like 1U servers and network devices. It features a max speed of 4400 RPM, delivering 9.4 m³/h airflow while maintaining an ultra-quiet 14.9 dB noise level. Equipped with anti-vibration mounts and a full accessory kit, it ensures easy, vibration-free installation. Trusted by professionals, this fan combines award-winning aerodynamic design with reliable, silent cooling performance.

Specifications

ASIN	B072JK9GX6
Air Flow Capacity	9.4 Cubic Metres Per Hour
Best Sellers Rank	87,790 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 921 in Thermal Management Products 1,343 in Fans & Cooling
Brand	Noctua
Compatible Devices	Desktop, Server, Router, Switch
Compatible devices	Desktop, Server, Router, Switch
Cooling Method	Air
Cooling method	Air
Country Of Origin	Taiwan
Customer Reviews	4.8 out of 5 stars 2,365 Reviews
Included Components	1
Item Dimensions L x W x H	40L x 40W x 20H millimetres
Manufacturer	Noctua
Manufacturer Part Number	NF-A4x20 FLX
Material	Plastic
Max Rotational Speed	4400 RPM
Model Number	NF-A4x20 FLX
Noise Level	14.9 Decibels
Number of Items	1
Power Connector Type	3-Pin
Power connector type	3-Pin
Product dimensions	40L x 40W x 20H millimetres
UPC	841500110116
Unit Count	1.0 count
Voltage	12 Volts

Reviews

T**N

Just received fan box open and used condition

Just received order supposed to be brand new and seal was broken boxes flap looked like it had been opened and fan is not facing the display boxes opening at front. it’s upside down and the anti vibration mount is bent out of pack and looks damaged

2.12.2024

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TrustScore 4.5 | 7,300+ reviews

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