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The only unit here that publishes the diameter of its fans

aiten data 19-inch 1U panel, four 12 cm ball-bearing fans, digital thermostat, 485 × 305 × 45 mm

Four twelve-centimetre fans on ball bearings, which is the only fan dimension published anywhere in this hub, with a digital stage control and every outer measurement printed.

Aiten Data black 19-inch 1U cooling panel with four fans and a digital display

aiten data 19-inch 1U panel, four 12 cm ball-bearing fans, digital thermostat, 485 × 305 × 45 mm

Four twelve-centimetre fans on ball bearings, which is the only fan dimension published anywhere in this hub, with a digital stage control and every outer measurement printed.

Fan count
Four — stated in the title and in the second bullet, which describes four fans of 12 cm diameter with ball bearings
Fan size
12 cm in diameter, with ball bearings — stated in the second bullet. It is the only fan dimension published on this shelf, and the bearing type is named nowhere else either
Stated airflow
Not published on the listing — no figure appears in any bullet. The second gives the fan diameter and the bearing type instead, which describe the fans rather than what they move
Airflow unit
Not published on the listing, because no airflow figure is given for a unit to attach to
Stated noise level
Not published on the listing — no decibel figure and no measuring distance appears anywhere on the page
Roof or rack-mount format
Rack-mounted — the first bullet gives a standard width of 19 inches and a height of 1U, and the third describes side anchorages for easy fixing to rack cabinets
Rack units occupied
One — stated in the first bullet. The fifth gives the height as 45 mm, which is a rack unit
Airflow direction
Not published on the listing — nothing says which way the fans push, and nothing says whether they can be turned in their frame. None of the seven listings on this shelf publishes a direction
Thermostat or speed control
A digital display with which the stages can be controlled, and an internal temperature sensor — both stated in the second bullet. No threshold range and no number of stages is published on the listing
Power connection
220 V at 50 Hz with a European plug — stated in the second bullet. It is the only listing on this shelf to name the plug type
Amazon reference
B08K98WW7T (same reference on 5 Amazon marketplaces)
EAN
6940533543527
  • Publishes the fan diameter, 12 cm, which no other listing in this hub does
  • Names the bearing type, which is what decides how a fan ages
  • No airflow figure and no noise level, on a panel with four fans of a stated size

Best for: A 19-inch rack where the fan size matters for replacement later, and the buyer can spare a rack unit for the panel.

≈ 108 €
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Specifications

Fan count
Four — stated in the title and in the second bullet, which describes four fans of 12 cm diameter with ball bearings
Fan size
12 cm in diameter, with ball bearings — stated in the second bullet. It is the only fan dimension published on this shelf, and the bearing type is named nowhere else either
Stated airflow
Not published on the listing — no figure appears in any bullet. The second gives the fan diameter and the bearing type instead, which describe the fans rather than what they move
Airflow unit
Not published on the listing, because no airflow figure is given for a unit to attach to
Stated noise level
Not published on the listing — no decibel figure and no measuring distance appears anywhere on the page
Roof or rack-mount format
Rack-mounted — the first bullet gives a standard width of 19 inches and a height of 1U, and the third describes side anchorages for easy fixing to rack cabinets
Rack units occupied
One — stated in the first bullet. The fifth gives the height as 45 mm, which is a rack unit
Airflow direction
Not published on the listing — nothing says which way the fans push, and nothing says whether they can be turned in their frame. None of the seven listings on this shelf publishes a direction
Thermostat or speed control
A digital display with which the stages can be controlled, and an internal temperature sensor — both stated in the second bullet. No threshold range and no number of stages is published on the listing
Power connection
220 V at 50 Hz with a European plug — stated in the second bullet. It is the only listing on this shelf to name the plug type
Amazon reference
B08K98WW7T (same reference on 5 Amazon marketplaces)
EAN
6940533543527

On the listing

A digital four-fan thermostat unit of standard 19-inch width and 1U height, in black; a digital display with which the stages can be controlled, an electrical connection of 220 V at 50 Hz with a European plug, an internal temperature sensor and four fans of 12 cm diameter with ball bearings; a construction in cold-rolled steel finished with a black rust and powder coating, with side anchorages for easy fixing to rack cabinets; a width of 485 mm and a depth of 305 mm; and a height of 45 mm at a weight printed as 5,055 g.

Twelve centimetres

Seven cooling units in this hub. One of them says how big its fans are.

That sounds like a footnote and it is closer to the specification. Fan size decides two things that matter more than the marketing on any of these pages.

The first is noise. A large fan turning slowly moves the same volume of air as a small fan turning fast, and makes considerably less noise doing it. This panel publishes no decibel figure, and 12 cm is nonetheless an argument about how it will sound.

The second is what happens in four years. A 120 mm fan is a commodity — they are sold everywhere, in every quality, at every noise rating. A panel whose fan size is known is a panel that can be repaired or quietened; a panel whose fan size is a mystery is a panel that gets replaced whole.

One cabinet on the cabinets hub of this site names the same 120 mm size as the aperture in its own roof, which is a measure of how standard the figure is.

Ball bearings

The same bullet names the bearing type, and again nothing else in this hub does.

A rack fan runs continuously, horizontally, in warm air, for years. The bearing is the part that determines whether it is still quiet at the end of that period or has become the hum that everybody in the office has stopped noticing and nobody has fixed.

Naming it is a small signal about who wrote the page. This is a listing describing an object rather than a benefit.

Everything measured except the air

The fourth and fifth bullets give 485 mm wide, 305 mm deep, 45 mm high. The second gives the voltage, the frequency and the plug type — the only plug named anywhere on this shelf.

What is not there is any figure for what the four fans actually move. No airflow. No noise level. Two listings on this shelf publish an airflow and two publish a decibel range, and this is not one of either pair.

So the page describes the machine in detail and its output not at all, which is the opposite of the usual failure on this shelf and no more satisfying.

A weight that needs reading carefully

The fifth bullet gives the weight as 5,055 g.

That comma may be a decimal separator, in which case it would be about five grams — absurd for a steel panel carrying four fans — or a thousands separator in the English style, in which case it is 5055 g, a little over five kilograms. This site prints the figure as the listing prints it rather than converting it into whichever reading looks tidier.

Only the second reading fits the object, and a little over five kilograms is a heavy panel for one rack unit — precisely what four 12 cm fans in a steel frame ought to weigh.

The German offer that was not there

At the time of the survey this product had no offer on the German store, and the price sits in the specification of other markets instead.

That is why it appears last in this hub rather than because it is the dearest: the ordering here follows the German price, and this listing did not have one to be ordered by. The prices that exist are worth comparing across markets before buying, and the availability section below gives what was found.

Before ordering

Ask for an airflow figure, because a fan diameter is not one. Check the 305 mm depth against the cabinet rails. And note the plug: 220 V with a European plug is stated, which is the only power detail this thorough anywhere on this shelf.

Availability

Priced from 108 € to 137 € across the Italian and Spanish Amazon stores the day this page was checked.

In the German, American and French Amazon catalogues with no live offer against it: the reference exists, nobody is filling it.

The British Amazon store returned nothing at all, so the buy button there opens a search in that country rather than a page that would not load.

Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.

Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.

More rack cooling fans

  • DSIT black four-fan cooling unit for a deep server cabinet

    DSIT four-fan unit with thermostat for 800 mm cabinets, 410 × 40 × 40 mm

    Four fans and a thermostat sold for a specific cabinet depth, with a fourth bullet that does something no other listing in this hub does: it tells you when the product will work less well.

    Fan count
    Four — stated in the title as a fan package of four fans with a thermostat, and named again in the first bullet, which consists of the single word fans
    Fan size
    Not published on the listing — no diameter appears. The fifth bullet gives the unit as 410 × 40 × 40 mm in width, depth and height, which describes the assembly rather than a fan
    Stated airflow
    Not published on the listing — no figure appears in any bullet. The fourth qualifies the unit’s effectiveness instead, saying it decreases with a server cabinet that has perforated doors
    Airflow unit
    Not published on the listing, because no airflow figure is given for a unit to attach to
    Stated noise level
    Not published on the listing — no decibel figure and no measuring distance appears anywhere on the page
    Roof or rack-mount format
    Not published on the listing — the title calls it a fan unit suitable for server cabinets of 800 mm depth, and no bullet says whether it mounts in the roof, on the profile rails or anywhere else
    Rack units occupied
    Not published on the listing — no rack unit figure appears, and the mounting format that would imply one is not stated either
    Airflow direction
    Not published on the listing — nothing says which way the fans push. The fourth bullet is the only statement anywhere on this shelf about where the air ends up, and it is a warning rather than a direction
    Thermostat or speed control
    A thermostat — stated in the title as part of the package. No threshold range, no display and no control detail is published on the listing
    Power connection
    A connecting cable is included, described in the third bullet as 3-port, Del-109. No voltage, no plug type and no lead length is published
    Amazon reference
    B017M06LSA (same reference on 5 Amazon marketplaces)
    EAN
    8719172411638
    • States a condition in which the unit works less well, which nothing else in this hub does
    • Four fans and a thermostat together, at the lower half of this shelf
    • No mounting format anywhere, so nothing says where in the cabinet it goes

    Best for: A deep floor-standing cabinet of around 800 mm where four fans and a thermostat are wanted and the seller can be asked the rest.

    ≈ 113 €
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  • Extralink black four-fan 19-inch cooling panel with a digital temperature display

    EXTRALINK four-fan 19-inch panel with thermostat, digital display, threshold -40 to 50 °C

    The only cooling unit here that publishes the range its thermostat can be set across, and the only one with a fuse named in the description rather than left inside the case.

    Fan count
    Four — stated in the title as a fan panel with four fans for a floor-standing server cabinet
    Fan size
    Not published on the listing — no diameter and no frame dimension appears in any bullet. The second calls the unit both strong and quiet without measuring either
    Stated airflow
    Not published on the listing — no figure appears. The first bullet says the unit secures optimal air circulation in a 19-inch cabinet, protects the equipment and increases its service life, all without a number
    Airflow unit
    Not published on the listing, because no airflow figure is given for a unit to attach to
    Stated noise level
    Not published on the listing — the second bullet describes the unit as quiet and no decibel figure and no measuring distance follows it
    Roof or rack-mount format
    Not published on the listing as one or the other — the title names a fan panel for a 19-inch network cabinet and a floor-standing server cabinet, and no bullet says whether it sits in the roof or on the profile rails
    Rack units occupied
    Not published on the listing — no rack unit figure appears anywhere, and the mounting format that would imply one is not stated either
    Airflow direction
    Not published on the listing — nothing says which way the fans push, and nothing says whether they can be turned in their frame
    Thermostat or speed control
    A thermostat with a digital temperature display, stated in the title and in the second and third bullets, with thresholds settable from -40 to 50 degrees according to the fourth. It is the widest threshold range published on this shelf and the only one given as a span
    Power connection
    Not published on the listing — no lead, inlet, voltage or plug is named. The fifth bullet offers a 36-month warranty instead
    Amazon reference
    B09ZVJY6VC (same reference on 5 Amazon marketplaces)
    EAN
    5903148914718
    • Publishes the threshold range the thermostat covers, which only one other unit here does
    • A built-in fuse, named in the title and nowhere else in this hub
    • No airflow figure at all, on a four-fan panel

    Best for: A floor-standing cabinet where the thermostat needs setting precisely and the buyer already knows how the panel will be mounted and powered.

    ≈ £140 / 132 €
    Check price on Amazon
  • Intellinet black 19-inch 1U cooling unit with two fans mounted on rack rails

    INTELLINET NETWORK SOLUTIONS 19-inch 1U rail-mounted unit, two fans, 95–115 CFM, 44–49 dB/A, IEC 297-3

    The most measured product on this shelf: airflow, fan speed and noise level all printed as ranges, with a standard cited by number and a frame thickness in millimetres.

    Fan count
    Two — stated in the title, which describes a cooling unit with two fans for 19-inch cabinets, mounted on the profile rails
    Fan size
    Not published on the listing — no diameter and no frame dimension appears. The fourth bullet gives a fan speed of 2700 to 3100 rpm instead, which describes how fast they turn and not how big they are
    Stated airflow
    95 to 115 CFM — stated in the third bullet as the air throughput. It is one of only two airflow figures on this shelf, and the range is given rather than a single number
    Airflow unit
    Cubic feet per minute — the third bullet quotes CFM. The other airflow figure on this shelf is in cubic metres, per minute and per hour, so the two cannot be compared without converting one of them
    Stated noise level
    44 to 49 dB/A — stated in the fifth bullet. The measuring distance is not published on the listing, which is the figure a decibel number needs to be comparable
    Roof or rack-mount format
    Rack-mounted — stated in the title as a unit for mounting on the profile rails of a 19-inch cabinet, at one rack unit
    Rack units occupied
    One — stated in the title
    Airflow direction
    Not published on the listing — nothing says which way the fans push, and nothing says whether they can be turned in their frame. None of the seven listings on this shelf publishes a direction
    Thermostat or speed control
    Not published on the listing — no thermostat, no speed switch and no temperature sensor is named in any of the seven bullets. Four of the seven units on this shelf have one and this is one of the three that do not
    Power connection
    220 to 240 V at 50 to 60 Hz — stated in the sixth bullet as the operating voltage. No lead, inlet or plug type is published
    Amazon reference
    B00NW47CCK (same reference on 6 Amazon marketplaces)
    EAN
    0766623712668
    • Airflow, fan speed and noise all published as ranges, which no other unit here manages
    • Cites IEC 297-3 by number rather than claiming rack compatibility in general terms
    • No thermostat and no speed control, so the fans run whenever they are powered

    Best for: A cabinet needing continuous ventilation with a known air throughput, in a room where 44 to 49 decibels is acceptable all day.

    ≈ 103 €
    Check price on Amazon

Others worth having spare

  • Koscom Connect black perforated 19-inch 1U pull-out rack shelf

    KOSCOM CONNECT 19-inch 1U sliding shelf, 483 × 350 × 45 mm, rails adjustable 350–505 mm, 5 kg

    A tray that comes out of the cabinet instead of staying in it, which is the whole argument for it — and a five-kilogram limit, which is the price of the mechanism.

    Rack units
    One — stated in the fourth bullet, which gives the dimensions as 48.3 × 35 × 4.5 cm for a 1U pull-out tray
    Mounting depth
    For cabinets from 450 mm depth — stated in the first and fourth bullets, the latter giving the range as 450 mm up to 600 mm. The third adds that the spacing of the profile rails is adjustable in depth from 35 to 50.5 cm
    Cantilever or four-post support
    Not published on the listing — the third bullet says the tray installs on the profile rails of the rack with an adjustable rail spacing, and no bullet names a post count or says whether the rear is carried
    Stated load rating
    Maximum 5 kg — stated in the second bullet. It is by a wide margin the lowest figure on this shelf, where the fixed trays run from about 15 kg to 110 kg
    Vented or solid surface
    Vented — the second bullet describes high-grade perforated sheet, stable and able to withstand high loads while allowing passive cooling
    Sliding or fixed
    Sliding — stated in the title and in the first bullet as a pull-out tray, offered for components that cannot be rack-mounted and for easier access. It is the only sliding shelf in this hub
    Usable surface dimensions
    Not published on the listing — the fourth bullet gives 48.3 × 35 × 4.5 cm as the dimensions of the tray, which are outer figures. No separate surface measurement appears
    Fixings supplied
    Not published on the listing — no screws, cage nuts or washers are listed. The third bullet says the tray installs easily on the profile rails and names no hardware
    Amazon reference
    B0D96B839H (same reference on 6 Amazon marketplaces)
    EAN
    4043089462211
    • The only shelf in this hub that pulls out, which is the difference between reading a label and moving a cabinet
    • The rail spacing adjusts across 155 mm, from 350 to 505 mm
    • Five kilograms, a third of the 15 kg a fixed tray here carries

    Best for: A cabinet holding something that has to be reached rather than merely stored — a small drive, a console, a labelled patch record.

    ≈ £45 / 35 €
    Check price on Amazon
  • HMF black 19-inch 1U rack shelf with front mounting flanges

    HMF 19-inch 1U shelf, 300 mm mounting depth, 483 × 300 × 44 mm, 16 kg, cage nuts included

    The shelf that describes its own installation most precisely — fixing points on the front face, at one rack unit — and publishes its own weight alongside the load it will carry.

    Rack units
    One — stated in the title and in the fourth bullet, which puts 1 HE in brackets after the description of the fixing points
    Mounting depth
    300 mm — stated in the title as the installation depth, and in the first bullet as a requirement: the shelf suits 19-inch cabinets offering at least 300 mm of mounting depth
    Cantilever or four-post support
    Neither term is used, and the fourth bullet describes the arrangement plainly: a quick installation on the profile rails thanks to fixing points on the front face. A shelf carried at the front alone is what the cantilever entry in this table describes, and the listing does not use the word
    Stated load rating
    About 16 kg — stated in the fifth bullet alongside the dimensions and the weight. The word about is the maker’s own
    Vented or solid surface
    Not published on the listing — no perforation, no vent and no airflow claim appears in any of the five bullets. The third describes stable steel sheet with a scratch-resistant black powder coating
    Sliding or fixed
    Fixed — stated in the first bullet as a shelf for fixed installation, and confirmed by the fourth, which describes it bolted to the profile rails
    Usable surface dimensions
    Not published on the listing — the fifth bullet gives 483 × 300 × 44 mm as the width, depth and height of the shelf, which are outer dimensions. No separate figure for the flat surface appears
    Fixings supplied
    Cage nuts — named in the fifth bullet as the accessory. No screws and no washers are listed alongside them
    Amazon reference
    B09F1DQCSD (same reference on 5 Amazon marketplaces)
    EAN
    4010537659929
    • Describes the fixing arrangement in plain words, which five of the seven shelves here never do
    • Publishes its own weight, 1.44 kg, as well as the load it carries
    • Nothing says whether the surface is perforated, and this is a cabinet part

    Best for: A 19-inch cabinet of at least 300 mm depth holding a modest, awkward object that needs a stable platform and nothing more.

    ≈ 21 €
    Check price on Amazon
  • StarTech pair of black vented 19-inch 1U cantilever rack shelves

    StarTech two 1U vented cantilever shelves, 25 cm deep, 20 kg each, tested at 1.5 times load

    The only shelf here sold in pairs and the only one whose maker states a test margin above the rating, at a quarter of a metre deep and twenty kilograms a tray.

    Rack units
    One each — stated in the title and in the first bullet, which describes two 1U vented cantilever rack shelves in a set
    Mounting depth
    25 cm — stated in the title. No minimum cabinet depth is named, and no adjustment range appears
    Cantilever or four-post support
    Cantilever — stated in the title and in the first bullet, and detailed in the fourth as SPCC cold-rolled steel with cantilever front mounting. It is one of only two listings on this shelf to name its support arrangement in words
    Stated load rating
    Up to 20 kg per shelf — stated in the title and in the fourth bullet, which adds that the shelves are tested at one and a half times that load. The test is the maker’s statement and no test document is named
    Vented or solid surface
    Vented — stated in the title and in the third bullet, which describes a perforated 1U tray supporting even airflow and reducing hot spots under servers or audio-visual equipment
    Sliding or fixed
    Fixed — the fourth bullet describes cantilever front mounting, and no bullet mentions runners or any pull-out action
    Usable surface dimensions
    Not published on the listing — 25 cm is given as the depth in the title and no width or surface figure appears in any of the five bullets
    Fixings supplied
    Not published on the listing — no screws, cage nuts or washers are listed. The first and second bullets describe fitting out several racks to a consistent layout and name no hardware
    Amazon reference
    B0GZLDHSV1 (same reference on 6 Amazon marketplaces)
    EAN
    0065030937498
    • Two shelves in one pack, which no other listing on this shelf offers
    • Names the cantilever arrangement outright rather than leaving it to be inferred
    • The dearest listing on this shelf, and it is two of the simplest shelves here

    Best for: Two cabinets, or one cabinet being fitted out to a consistent layout, where both trays go in at the same time.

    ≈ $58 / £70 / 76 €
    Check price on Amazon

All rack cooling fans