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Two fans, a thermostat, and one bullet of description in total

KOSCOM CONNECT roof fan unit, two fans, switch and thermostat

The cheapest cooling unit in this hub and the least documented product on any shelf of this site: two fans, a switch and a thermostat named in the title, and one sentence of description behind them.

Koscom Connect black roof fan unit with two fans for a network cabinet

KOSCOM CONNECT roof fan unit, two fans, switch and thermostat

The cheapest cooling unit in this hub and the least documented product on any shelf of this site: two fans, a switch and a thermostat named in the title, and one sentence of description behind them.

Fan count
Two — stated in the title. No bullet repeats or expands on it
Fan size
Not published on the listing — no diameter, no frame dimension and no fan model appears. The single bullet calls the fans powerful and stops there
Stated airflow
Not published on the listing — no figure of any kind appears. The single bullet says the unit provides optimal air circulation in a network or server cabinet, which is a claim rather than a measurement
Airflow unit
Not published on the listing, because no airflow figure is given for a unit to attach to. Two of the seven listings on this shelf publish a figure, one in cubic feet per minute and one in cubic metres
Stated noise level
Not published on the listing — no decibel figure and no measuring distance appears anywhere
Roof or rack-mount format
Roof — stated in the title as a roof fan unit for a network cabinet, and repeated in the single bullet
Rack units occupied
Not published on the listing — a roof unit sits in the cabinet top rather than on the rails, and the page never says so or gives any mounting dimension
Airflow direction
Not published on the listing — nothing says which way the fans push, and nothing says whether they can be reversed in their frame
Thermostat or speed control
A switch and a thermostat — both named in the title. No threshold range, no display and no control detail is published
Power connection
Not published on the listing — no lead, no inlet, no voltage and no plug is named
Amazon reference
B0DWN5JJG4 (same reference on 5 Amazon marketplaces)
EAN
4043089463980
  • A thermostat and a switch at the lowest price on this shelf
  • A roof unit, which is the format that does not consume a rack unit
  • One bullet of description, and not a single measurement in it

Best for: A cabinet that is already too warm and a buyer prepared to ask the seller every question this page leaves open.

≈ 60 €
Check price on Amazon

Specifications

Fan count
Two — stated in the title. No bullet repeats or expands on it
Fan size
Not published on the listing — no diameter, no frame dimension and no fan model appears. The single bullet calls the fans powerful and stops there
Stated airflow
Not published on the listing — no figure of any kind appears. The single bullet says the unit provides optimal air circulation in a network or server cabinet, which is a claim rather than a measurement
Airflow unit
Not published on the listing, because no airflow figure is given for a unit to attach to. Two of the seven listings on this shelf publish a figure, one in cubic feet per minute and one in cubic metres
Stated noise level
Not published on the listing — no decibel figure and no measuring distance appears anywhere
Roof or rack-mount format
Roof — stated in the title as a roof fan unit for a network cabinet, and repeated in the single bullet
Rack units occupied
Not published on the listing — a roof unit sits in the cabinet top rather than on the rails, and the page never says so or gives any mounting dimension
Airflow direction
Not published on the listing — nothing says which way the fans push, and nothing says whether they can be reversed in their frame
Thermostat or speed control
A switch and a thermostat — both named in the title. No threshold range, no display and no control detail is published
Power connection
Not published on the listing — no lead, no inlet, no voltage and no plug is named
Amazon reference
B0DWN5JJG4 (same reference on 5 Amazon marketplaces)
EAN
4043089463980

On the listing

A roof fan unit for a network cabinet with two fans, a switch and a thermostat, described in a single bullet as providing optimal air circulation in a network or server cabinet by means of powerful fans.

One bullet

That is the entire description, and it is worth stating plainly rather than dressing up.

Seven listings sit on this shelf. Five of them have five bullets, one has seven. This one has one, and the one contains no number.

Everything above in the specification table comes from the title: two fans, a switch, a thermostat, a roof format. Everything else — how much air, how loudly, how big the fans, which way they blow, what plug is on the end of it, what hole it needs in the cabinet roof — is absent.

What a cooling unit is bought on

The three figures that decide a fan panel are airflow, noise and fit.

Airflow says whether the unit will move the heat a cabinet makes. Two listings on this shelf publish one, and the units they use are different from each other, which is itself a reason the number has to be printed rather than assumed. This page publishes none.

Noise says whether the cabinet can live in a room where somebody works. Two listings publish a decibel range. This page does not, and quiet is not claimed either.

Fit, for a roof unit, is a hole in the top of a cabinet. The other roof unit on this shelf names the cabinet families it is drilled for. This page names nothing, so the aperture has to be measured and the footprint requested before an order can safely be placed.

The thermostat, which is the reason to look at all

What the title does offer is a thermostat and a switch, at the lowest price in this hub.

A thermostat is genuinely the control that matters. Fans running continuously in a cabinet that is only warm for four hours a day are noise, wear and electricity for nothing; a thermostat turns the unit into something that responds to the cabinet rather than to the clock.

Four of the seven listings here carry one. Two of those publish the threshold range it works across. This one publishes the word.

A roof unit costs no rack space

The one structural advantage of this format deserves saying, because it is real and it is free.

A 1U fan panel occupies a rack unit — in a six-unit cabinet that is a sixth of the installation spent on cooling. A roof unit sits in the cabinet top and consumes none of it.

On the cabinets hub of this site the cabinets run from three rack units to eighteen, and at the small end that difference is the whole argument for buying a roof unit rather than a panel.

Before ordering

Measure the aperture in the cabinet roof and ask the seller for the unit’s footprint and hole pattern, because nothing on this page will tell you whether it fits. Ask what plug or inlet it arrives with. And if the cabinet is in a room where anyone works, ask for a noise figure — two listings on this shelf will give you one without being asked.

Availability

Priced at roughly 60 € on the German Amazon store the day this page was checked.

In the American, French, Italian and Spanish 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

  • DIGITUS black four-fan roof cooling module for a network cabinet

    DIGITUS four-fan roof module, 9.2 m³/min and 552 m³/h free-blowing, 60–65 dB, 13.8 W

    The best-measured cooling unit in this hub and the only one that says what its airflow figure assumes: 552 cubic metres an hour, free-blowing, which is not the same as inside a closed cabinet.

    Fan count
    Four — stated in the title and in the third bullet, which gives the count alongside the two airflow figures
    Fan size
    Not published on the listing — no diameter and no frame dimension appears in any bullet. The third gives the airflow and the count and no dimension for either fan
    Stated airflow
    9.2 m³/min, and 552 m³/h given as the free-blowing volume flow — both stated in the third bullet. The words free-blowing are the maker’s own and they qualify the figure: it is the throughput with nothing resisting it, rather than inside a closed cabinet
    Airflow unit
    Cubic metres, published twice — per minute and per hour. The other measured unit on this shelf publishes cubic feet per minute, so the two cannot be compared without converting one of them
    Stated noise level
    60 to 65 dB with four fans fitted — stated in the fourth bullet, which ties the figure explicitly to the number of fans running. The measuring distance is not published on the listing. It is the loudest figure on this shelf
    Roof or rack-mount format
    Roof — stated in the title and in the second bullet, which describes a roof fan module and says matching holes are present in the cabinet roof of the ranges named in the first
    Rack units occupied
    None stated, and a roof module consumes none: the second bullet places it in the cabinet roof rather than on the profile rails. No rack unit figure appears on the page
    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. The second bullet places the module in the roof and stops there
    Thermostat or speed control
    A thermostat covering 0 °C to +35 °C — stated in the fourth bullet. It is one of two threshold ranges published on this shelf and the narrower of the two
    Power connection
    A rated power of 13.8 W, with an input of AC 50 Hz at 240 V, AC 60 Hz at 220 V or DC 48 V — all stated in the fifth bullet. No lead, inlet or plug type is published
    Amazon reference
    B00DNRPFQG (same reference on 6 Amazon marketplaces)
    EAN
    4016032332855
    • The only listing here that says what its airflow figure assumes, by naming it free-blowing
    • Publishes the airflow in two units, so no conversion is needed to read it
    • Sixty to sixty-five decibels, the loudest figure published in this hub

    Best for: A DIGITUS cabinet of one of the named ranges, in a room where nobody has to sit next to sixty decibels.

    ≈ 92 €
    Check price on Amazon
  • 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 €
    Check price on Amazon
  • 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 €
    Check price on Amazon

Others worth having spare

  • Tecmojo black vented 19-inch 1U four-post rack shelf with adjustable rear brackets

    Tecmojo 19-inch 1U four-post shelf, 550 mm deep, adjustable 343 mm upwards, 110 kg

    The only four-post shelf in this hub, and the only one that carries three figures instead of one: 110 kilograms, an adjustable depth, and a hardware list counted item by item.

    Rack units
    One — stated in the title and in the first bullet, which describes a 1U four-post server rack tray for 19-inch racks and cabinets
    Mounting depth
    Adjustable — the title gives a shelf depth of 550 mm and a variable mounting depth from 343 mm to 800 mm, while the first bullet gives the same range as 34.3 cm to 80.8 cm. The lower figure agrees; the upper differs between the two, and neither is withdrawn
    Cantilever or four-post support
    Four-post — stated in the first bullet, which calls it a 1U four-post server rack tray designed for 19-inch racks and cabinets with an adjustable mounting depth. It is the only listing on this shelf to name the arrangement in those words
    Stated load rating
    Up to 110 kg — stated in the title and in the second bullet, which names industrial-grade SPCC cold-rolled steel and gives tower servers, uninterruptible power supplies, NAS units and amplifiers as the equipment it has in mind. It is five times the next highest figure on this shelf
    Vented or solid surface
    Vented — stated in the title as a rack tray with ventilation openings, and in the third bullet, which credits the vented design with constant air circulation and effective heat dissipation
    Sliding or fixed
    Fixed — stated in the title as a shelf for fixed installation, and in the second bullet, which calls it a fixed rack tray
    Usable surface dimensions
    Not published on the listing — the title gives the shelf as 550 mm deep and no width or surface figure appears in any bullet
    Fixings supplied
    Sixteen M6 bolts, eight M6 cage nuts, eight flange nuts, two non-slip stoppers and two hook-and-loop cable ties — listed item by item in the fourth bullet, the only counted hardware list on this shelf
    Amazon reference
    B0GDPBJ17V (same reference on 6 Amazon marketplaces)
    EAN
    5061116020448
    • A hundred and ten kilograms on four posts, five times anything else on this shelf
    • The hardware is listed piece by piece, down to two non-slip stoppers
    • The upper depth figure is 800 mm in the title and 80.8 cm in the first bullet

    Best for: A deep cabinet holding something genuinely heavy — a tower server, an uninterruptible power supply, a stack of drives — where front-only support would not do.

    ≈ 40 €
    Check price on Amazon
  • BIGtec Hirose TM31 shielded RJ45 plug in grey with insertion guide and boot

    BIGtec Hirose TM31 plug, Cat 6a to 500 MHz, AWG 24-27, cable 6.6 mm, pack of 100

    The only plug on this shelf identified by its own manufacturer and part reference rather than by a house name, published at a single sheath diameter of 6.6 mm and stated outright as not for flat ribbon cable.

    Category rating
    Cat 6a to 500 MHz — stated in the second bullet, with Cat 6, 6a and 7 cable named in the title. ISO/IEC 11801 is named in the third bullet, together with PoE conformity to 802.3af and use in 10 Gigabit networks
    Solid or stranded compatibility
    Not published on the listing — the gauge window is written as AWG 24-27 without the conductor-count suffix that would carry the answer, and neither construction is named in the five bullets
    Shielded or unshielded
    Shielded — stated in the third bullet, with gold-plated contacts named alongside
    Accepted conductor diameter
    AWG 24-27 — stated in the title and again in the second bullet. No millimetre figure is given for the conductor
    Accepted cable diameter
    6.6 mm — stated in the second bullet as a single figure rather than a range. It is the only outside diameter on this shelf quoted without a tolerance either side of it
    Load bar presence
    Supplied — the first bullet lists an insertion guide with the plug and the boot, as the three things in the packet
    Pass-through or standard body
    Standard — the plug is identified as a Hirose TM31 and nothing on the page describes conductors emerging at the front or being trimmed flush
    Pack quantity
    One hundred — stated in the title
    Amazon reference
    B01LYUHUOK (same reference on 2 Amazon marketplaces)
    EAN
    4051687021129
    • The plug is identified by its own maker and part reference, which nothing else here does
    • States what it will not take — flat ribbon cable — rather than leaving the shape unmentioned
    • Solid or stranded is not stated, and the gauge notation carries no suffix to imply it

    Best for: Round screened cable of a known diameter, where the plug reference itself is what has to be matched to an existing installation.

    ≈ 92 €
    Check price on Amazon
  • Cable Matters Cat 6 pass-through RJ45 plugs in a screw-top storage tub

    Cable Matters Cat 6 pass-through plug, 23-26 AWG, conductors 0.97-1.07 mm, cable to 5.8 mm, pack of 100

    The only plug on this shelf that publishes both a conductor diameter and an outside diameter in millimetres, and the only one that says outright it is for unshielded cable — with a title and a bullet that disagree about stranded.

    Category rating
    Cat 6 — stated in the title and the first bullet, rated in the third for a gigabit Ethernet channel and described as backwards compatible with Cat 5e
    Solid or stranded compatibility
    Both, in the bullets — the second states that the plug terminates solid or stranded cable with a three-point contact. The title says it is for solid wire, so the page carries two answers; the wider one is the maker’s own and is reported here with the difference noted
    Shielded or unshielded
    Unshielded — stated in the first bullet, which says the plug terminates unshielded twisted-pair cable. It is the only plug on this shelf to state a screening answer of either kind rather than claiming a screen
    Accepted conductor diameter
    0.97 to 1.07 mm over the insulation, 23 to 26 AWG — both stated in the first bullet. It is one of only two plugs here to publish a millimetre figure for the conductor
    Accepted cable diameter
    Up to 5.8 mm outside diameter — stated in the first bullet. It is the tightest of the three outside limits published on this shelf
    Load bar presence
    Not published on the listing — the second bullet describes feeding the wires through openings in the pass-through body instead, which is the function a load bar performs on a standard plug
    Pass-through or standard body
    Pass-through — stated in the title and in the first two bullets, with the conductors fed through the front and the plug crimped afterwards
    Pack quantity
    One hundred — stated in the title and the fourth bullet, supplied in a screw-top storage tub with a moulded handle
    Amazon reference
    B07PXMN2VK (same reference on 6 Amazon marketplaces)
    EAN
    0818707025734
    • Both diameters are published in millimetres, which no other plug on this shelf manages
    • States that it is for unshielded cable instead of leaving the screening question open
    • The title says solid wire and the second bullet says solid or stranded, which is a page arguing with itself

    Best for: A large run of leads made from unshielded Cat 6 stock, by someone who already owns a tool that trims pass-through plugs.

    ≈ $18 / £11 / 16 €
    Check price on Amazon

All rack cooling fans