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Airflow, fan speed and noise all published, and a standard by number

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.

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

Specifications

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

On the listing

A cooling unit with two fans for 19-inch cabinets, mounted on the profile rails, one rack unit high, in black, with the model number 712668; an antistatic powder coating; a steel frame 1.5 mm thick; an air throughput of 95 to 115 CFM; a fan speed of 2700 to 3100 rpm; a noise level of 44 to 49 dB/A; an operating voltage of 220 to 240 V at 50 to 60 Hz; and conformity with the standard IEC 297-3.

Ninety-five to a hundred and fifteen cubic feet per minute

Two listings on this shelf publish an airflow. This is one of them, and it is the only one that publishes the speed producing it.

Airflow of 95 to 115 CFM. Fan speed of 2700 to 3100 rpm. Both as ranges, both in the same bullet block.

Reading the two together tells you something a single number would not: this is a unit whose output varies with conditions, and the maker has given the envelope rather than the best case. That is a more honest way to publish a fan than one figure with nothing around it.

The unit of measurement is the catch, and it is the point the buying advice for this hub keeps returning to. CFM is cubic feet per minute. The other measured unit on this shelf publishes cubic metres, per minute and per hour. Those numbers cannot be laid side by side, and five of the seven listings here publish nothing at all to compare with either.

Forty-four to forty-nine decibels

The fifth bullet gives the noise level, and it is one of only two on this shelf.

That range is the sound of a working machine. It is not a quiet fan and it is not a loud one, and where it lands depends entirely on the room: inaudible in a plant room, perfectly noticeable in a study.

What the figure lacks is a measuring distance. A decibel number is meaningless without one, because sound falls away as it travels, and the same fan measured at one metre and at three produces two different figures. Both listings on this shelf that publish noise have this gap.

No thermostat anywhere

Now the omission, and on a unit this well measured it is a deliberate-looking one.

Seven bullets. Coating, frame thickness, airflow, fan speed, noise, voltage, standard. No thermostat, no speed switch, no temperature sensor.

That means the fans run whenever the unit is powered — full airflow and 44 to 49 dB/A through the night, through the winter, through every hour when the cabinet is cool and nothing is being asked of it.

Four of the seven listings on this shelf carry a thermostat. Two of those publish the temperature range it can be set across. This one buys its measurement precision at the cost of any control at all, and the answer for anybody who wants both is a switched socket outside the cabinet.

IEC 297-3, cited by number

The seventh bullet names a standard rather than claiming rack compatibility in words.

That is worth noticing because rack fit is the thing most listings assert and few substantiate. Alongside it the second bullet gives the frame as 1.5 mm steel — a thickness, not an adjective — and the first names the coating as antistatic.

Three specifications, three numbers or named properties. The whole page reads like a datasheet with the marketing removed, which is precisely why the missing thermostat is so visible.

Before ordering

Convert the airflow before comparing it with anything, because CFM and cubic metres are not the same scale. Decide whether continuous running is acceptable where the cabinet lives, since there is no thermostat. And ask what lead the unit takes: a voltage is published and a plug is not.

Availability

Priced from 103 € to 140 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.

It is stocked on the American and British Amazon stores as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.

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

  • kenable black 19-inch 1U rack fan tray with two fans and an LCD thermostat display

    kenable 19-inch 1U fan tray, two fans, digital thermostat with LCD, 180 mm mounting depth

    The only cooling unit on this shelf with a display on the front, showing the cabinet temperature and the fan setting, and the only one that names the length of the mains lead in the box.

    Fan count
    Two — stated in the fourth bullet, which describes two powerful fans providing air circulation in a 19-inch rack
    Fan size
    Not published on the listing — no diameter and no frame dimension appears. The fourth bullet calls the fans powerful and gives no measurement
    Stated airflow
    Not published on the listing — no figure appears in any bullet. The fourth describes optimal air circulation and effective cooling of IT and network equipment without quantifying either
    Airflow unit
    Not published on the listing, because no airflow figure is given. Two listings on this shelf publish one and they use different units from each other
    Stated noise level
    Not published on the listing — no decibel figure and no measuring distance appears. The fans are described as powerful rather than as quiet
    Roof or rack-mount format
    Rack-mounted — stated in the title as a 48.3 cm 19-inch 1U unit, and in the third bullet as a standard rack mounting with the fixing ears supplied, for data and communication cabinets
    Rack units occupied
    One — stated in the title and in the third bullet, which also gives a mounting depth of 180 mm
    Airflow direction
    Not published on the listing — the title and the fourth bullet describe a two-way fan system, which is not explained anywhere. Whether that names two fans, two directions or a reversible arrangement is not stated, and nothing says which way the air moves
    Thermostat or speed control
    A built-in thermostat switching the fans on and off automatically as the temperature crosses a set threshold, stated in the first bullet, with a large LCD display in the second for monitoring the current temperature and the fan settings. The threshold range is not published on the listing
    Power connection
    A 1.8 m IEC mains lead, included — stated in the fifth bullet as part of a complete set ready for immediate installation
    Amazon reference
    B0FJMDPX4W (same reference on 5 Amazon marketplaces)
    EAN
    5054338118246
    • A display showing the current cabinet temperature, which no other unit here offers
    • The mains lead is in the box and its length is printed
    • The two-way fan system is named twice and explained nowhere

    Best for: A rack where somebody wants to see the cabinet temperature without opening the door, and can spare a rack unit for it.

    ≈ £68 / 90 €
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  • 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 €
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  • 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

Others worth having spare

  • Stalflex black perforated 19-inch 1U rack shelf

    STALFLEX 19-inch 1U shelf, rear fixing, variable depth, 25 kg

    A 25 kg perforated shelf sold on a rear fixing and a variable depth, with five bullets of description and not one measurement among them.

    Rack units
    One — stated in the title and in the second bullet, which calls the standard 1U and 19-inch format a guarantee of secure mounting
    Mounting depth
    Not published in the title or in any bullet — the title says variable depth and stops there. The manufacturer reference recorded for this listing reads 150 mm, which is a catalogue string rather than a published specification, and no bullet confirms it
    Cantilever or four-post support
    Neither is named — the title states that the fixing is at the rear, which is not the arrangement either of the two named terms describes. No post count and no front-flange description appears in any bullet
    Stated load rating
    25 kg — stated in the title as the carrying capacity. It sits above three of the fixed shelves on this shelf and well below the four-post one
    Vented or solid surface
    Vented — the first and fourth bullets both describe a perforated shelf, credited with improving air circulation and with preventing equipment overheating
    Sliding or fixed
    Not published on the listing — no bullet says whether the shelf is bolted in place or runs on any kind of slide. The fourth mentions mounting equipment to it with cable ties to stop accidental slipping, which is about the equipment rather than the shelf
    Usable surface dimensions
    Not published on the listing — no width, no depth and no surface figure appears in the title or in any of the five bullets
    Fixings supplied
    Not published on the listing — no screws, no cage nuts and no washers are listed. The second bullet says the standard format guarantees secure mounting and names no hardware
    Amazon reference
    B0D9RT1V64 (same reference on 6 Amazon marketplaces)
    EAN
    5903351265003
    • Twenty-five kilograms, more than two of the three cheaper shelves here carry
    • Perforated, and the page says twice what the perforation is for
    • Not one dimension in five bullets, on a part whose whole job is to fit a space

    Best for: A shallow cabinet where 25 kg has to sit on something and the buyer can confirm the depth with the seller before ordering.

    ≈ 13 €
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  • ARLI shielded RJ45 crimp plug with metal strain relief, insertion guide and boot

    ARLI Crimp plug for installation cable to AWG23, five categories named, pack of 100

    The plug on this shelf with the longest list of cable categories, including the only mention of Cat 8.1, published for installation cable up to AWG23 — and one that never uses the words solid or stranded.

    Category rating
    No single rating is assigned to the plug itself. The first bullet names the cables it supports instead: Cat 5e, Cat 6, Cat 6a, Cat 7, Cat 7a and Cat 8.1. It is the only listing on this shelf to name Cat 8.1
    Solid or stranded compatibility
    Not published on the listing — neither word appears. What the first bullet names instead is a cable type, installation cable, which is a use rather than a conductor construction, and the page never says which construction the contacts are cut for
    Shielded or unshielded
    Shielded — stated in the second bullet, which names a screened construction with gold-plated contacts and credits both with consistent data transmission
    Accepted conductor diameter
    Up to AWG23 — stated in the first bullet as the ceiling for the installation cable it is compatible with. No lower limit is given, and no millimetre figure appears
    Accepted cable diameter
    Not published on the listing — the outside diameter never appears, although a boot and a metal strain relief both have to pass over the sheath
    Load bar presence
    Supplied — an insertion guide is included with every plug, named in the fourth and fifth bullets as part of what arrives in each polythene bag alongside the plug and the boot
    Pass-through or standard body
    Standard — the fourth bullet describes installation with a crimping tool, and nothing on the page describes conductors leaving the front of the body or being trimmed flush
    Pack quantity
    One hundred — stated in the title and in the fifth bullet, each plug bagged with its strain relief, insertion guide and boot
    Amazon reference
    B073XRKW1D (same reference on 3 Amazon marketplaces)
    EAN
    4260624572079
    • The gauge ceiling is published, and it is the one that suits the AWG23 installation cable sold on this site
    • Every plug arrives with its own insertion guide and boot rather than needing them ordered separately
    • Solid or stranded is never written, so the commonest mismatch on this shelf cannot be checked

    Best for: Terminating fixed runs of thick installation cable, where the AWG23 ceiling is the number that had to be matched.

    ≈ 30 €
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  • 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

All rack cooling fans