[11 x 8.6 x 2.2"] Absolutely LOVE this enclosure! Been searching for ANYTHING CLOSE to the XRackPro2 by GizMac (I believe they closed shop - so sad). I wish it was a little taller than 9U, but I made it work for my purposes by installing some smaller components in the back. Built SOLID! Love the quality construction! Fans are powerful without being too loud. And, of course, does a good job at noise reduction. Not as good as the XRackPro2 with noise reduction ... but all in all, DOES A GREAT JOB!

[0.9 lb] Great fan real quiet

[0.9 lb] Fan is much quieter then our old one. Love display and all of the data it includes.

[11 x 8.6 x 2.2"] Great fans.

Have to look into the case to see that their working.

[11 x 8.6 x 2.2"] As usual, the be quiets packaging of this PC cooling fan truly compliments its high-end design features and manufacturing quality control standards. Note however, that once the taped seals of the cover's front panels were cut on both pairs of fans I had just purchased, my careful attempts to pull out the inserted locking tabs of their front panels to be very frustrating.
And all of this care spent to keep their cartons intact, should I decide to re-sell these fans. And it's my guess that all my frustrations were due to the thick, high pound test construct of the carton's material, plus the bit oversized latching ears provided along the sides of these locking tabs.
And as for noise levels, with 60 dBA being that for a nearby, average-sized, refrigerator, plus 30 dBA being that of a nearby whisperer, and once the noisier, fast run-ups are achieved, the subsequent steady state noise is definitely less than top-speed rated 31.2 dBA.
And take note, have my fan pair installed as optional CPU Fan #2's in my second budget build gamer, featuring Fractal's Focus G mini-tower, with an AMD Ryzen 7 over-heating prone 5800-X CPU, being cooled by it-s installed be quiet Dark Rock Slim cooler, and driving an AMD Radeon RX6600 GPU, with a be quiet's Dark Power Pro 750 Watt for power. All installed on a ASUS TUF Gaming B550M-Plus WIFI II motherboard. Plus, a must replacement of the Focus G's front fans with Fractal's GP-12 PWM fans.
And this combo keeps the at above idle CPU temps at 47-50 degrees C, even with BIOS DPM activated, and its ASUS optimized settings red-icon activated. And these be quiet CPU Fan #2's are running at constant 1700-1800 rpm. And all total, maintaining my peace of mind for the extra costs of these PWM fans chosen to install. And have yet to do several runs of the on-line gaming performance evaluators.

[0.9 lb] Beautifully made and well designed cooling fan. Effective and does the job admirably! Shame AC Infinity do not offer the entire range in the UK and I had to import it from the US.

[0.9 lb] I saw this review a lot, so I thought I'd add to it. They're very quiet.

[0.9 lb] Already had a bequiet fan and I wanted to stay all in the family with the rest of my fans in case they produce different tones when spooling up. The unique looking fins and fan shape brought me to this brand. Works fine, moves some air, keeps things cool, and stays quiet.Recommended.

[11 x 8.6 x 2.2"] Quiet and effective

[0.9 lb] Since the Cooler Master fans were too thick for my Fractal Design case, I tried the Be Quiet Pure Wings 2. They did fit, and I can barely hear them. Decent airflow, and the price point was good. Also the PWM cable is long enough so you don't need extensions.