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: 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

⏳>150,000 hours MTTF reliability

🌀5000 RPM max speed

🔇Ultra-quiet 14.9 dB(A)

MX$944

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Description

🌀 Elevate your airflow game — small fan, massive impact!

COMPACT YET MIGHTY - Ultra-compact 40x40x20 mm size fits perfectly in 1U servers, NAS, routers, and DVRs without compromise.
TAILORED SPEED CONTROL - Three-speed settings (5000/4400/3700 RPM) let you customize airflow for ultimate balance between power and silence.
PRECISION COOLING POWER - Turbocharge airflow with up to 5000 RPM for peak performance in compact spaces.
WHISPER QUIET OPERATION - Experience near-silent cooling at just 14.9 dB(A) — because your focus deserves zero distractions.
VIBRATION FREE DURABILITY - Includes anti-vibration mounts and premium build for stable, long-lasting performance backed by a 6-year warranty.

The Noctua NF-A4x20 FLX is a premium 40x40x20 mm computer case fan designed for high-performance cooling in tight spaces. Featuring a max speed of 5000 RPM, ultra-quiet operation at 14.9 dB(A), and over 150,000 hours mean time to failure, it offers customizable airflow with three speed settings and advanced acoustic optimization. Ideal for 1U servers, NAS, and network devices, it comes with anti-vibration mounts and a 6-year warranty, making it a reliable choice for professionals demanding silent, efficient cooling.

Specifications

ASIN	B072JK9GX6
Air Flow Capacity	9.4 Cubic Meters Per Hour
Best Sellers Rank	#146 in Computer Case Fans
Brand	Noctua
Brand Name	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.8 out of 5 stars 2,513 Reviews
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
Product Dimensions	1.57"L x 1.57"W x 0.79"H
UPC	841500110116
Unit Count	1.0 Count
Voltage	12 Volts
Warranty Description	6 year manufacturer’s warranty

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MX$944

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

Secure transaction

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