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)

Product ID: 47568525

Details

Air Flow Capacity
9.4 Cubic Per
Brand
Noctua
Compatible Devices
Desktop
Cooling Method
Air
Material
Fibre-glass
Maximum Rotational Speed
5000 RPM

🌀5000 RPM max speed

🔇Ultra-quiet 14.9 dB(A)

🛠️Anti-vibration mounts included

€ 38.80

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In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌀 Stay cool, stay ahead — silence and power in perfect harmony!

COMPACT COMPATIBLE - 40x40x20 mm size fits perfectly in 1U servers, NAS, routers, and tight PC builds
DURABILITY MEETS DESIGN - Award-winning A-series frame with fibre-glass reinforced PBT ensures longevity and premium reliability
PRECISION COOLING POWER - Up to 5000 RPM for optimized airflow in compact spaces
VERSATILE SPEED CONTROL - 3-pin FLX with Low-Noise Adaptors lets you tailor performance from near-silent to max airflow
WHISPER QUIET OPERATION - Advanced Acoustic Optimisation keeps noise below 15 dB for distraction-free focus

The Noctua NF-A4x20 FLX is a premium 40mm computer case fan delivering up to 5000 RPM with ultra-quiet operation at just 14.9 dB(A). Designed for compact 1U applications and network/storage devices, it features advanced acoustic optimization, versatile speed settings via Low-Noise Adaptors, and anti-vibration mounts for stable, silent cooling. Backed by a 6-year warranty, it’s the go-to choice for professionals demanding reliable, whisper-quiet airflow in tight spaces.

Specifications

ASIN	B072JK9GX6
Air Flow Capacity	9.4 Cubic Meters Per Hour
Best Sellers Rank	#81 in Computer Case Fans
Brand Name	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.8 4.8 out of 5 stars (2,513)
Included Components	1
Item Dimensions L x W x H	1.57"L x 1.57"W x 0.79"H
Manufacturer	Noctua
Material Type	Fibre-glass reinforced PBT
Maximum Rotational Speed	5000 RPM
Model	NF-A4x20 FLX
Noise Level	14.9 Decibels
Part Number	NF-A4x20 FLX
Power Connector Type	3-Pin
UPC	841500110116
Unit Count	1.0 Count
Voltage	12 Volts
Warranty Description	6 year manufacturer’s warranty

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Fatima A.

Best international shipping I've ever tried. Worth every penny!

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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€ 38.80

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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