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Main image of Noctua NA-IS1-14 chromax.black Sx2, Inlet Side Spacers for 140mm Fans (Black)

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Noctua NA-IS1-14 chromax.black Sx2, Inlet Side Spacers for 140mm Fans (Black)

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Introducing a 5mm offset, NA-IS1-14 14cm inlet spacers can reduce influx turbulences in suction type applications where fans draw air through perforated panels or other obstacles in close proximity
Simple but effective: In many situations, reducing influx turbulence can lead to significantly improved airflow performance as well as lower noise levels and more pleasant sound signatures
Ideal for PC case intake fans, pull fans on water cooling radiators or other situations where fans draw air through grills, perforated panels, punctuated sheets, mesh structures, filters, etc.
Compatible with all current Noctua 140x25mm fans such as the popular NF-A14 or NF-P14s redux, not compatible with fans from other manufacturers
Sx2 set includes two inlet spacers, 8x NA-AV3 anti-vibration mounts, 8x screws for case fan installation, 8x screws for radiators with M3 threads and 8x screws for radiators with UNC 6-32 threads

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The NA-IS1-14 Sx2 is a set of two 5mm thick intake side spacer frames for Noctua 140x25mm fans that can help to improve both acoustics and performance in suction or "pull" type applications where the fan draws air through obstacles such as grills, perforated plates, mesh panels, filters or radiators. By offsetting the fan from the obstacle, the NA-IS1 inlet spacer reduces influx turbulences, which can, depending on the application and fan model, not only improve airflow but also significantly reduce overall noise levels and make the fan sound more pleasant to the ear. Designed to replace the fan's stock NA-AVP1 anti-vibration pads, the NA-IS1-14 are compatible with all current square-frame Noctua 140x25mm fans and extremely straightforward to install. In sum, the NA-IS1-14 Sx2 set is a simple yet highly effective fine-tuning measure for suction type applications where a reduction of influx turbulence can lead to improved airflow and acoustics.

More airflow, less noise

Reducing influx turbulences doesn't only improve acoustics, it also helps fans to operate more efficiently from an airflow performance point of view. In many suction-type applications, using inlet spacers can therefore enable fans to achieve both higher flow rates and lower noise emissions.

Improving suction acoustics

Suction applications where fans draw air through obstacles such as grills or perforated panels are notoriously challenging acoustically due to the turbulences caused by these obstacles. Introducing a 5mm off-set between the fan and the obstacle, the NA-IS1 spacers can reduce these turbulences, which often improves noise levels and/or noise profiles significantly.

Compatible with all current Noctua 140x25mm fans

Replacing the fan's stock NA-AVP1 anti-vibration pads, the NA-IS1-14 are compatible with all current Noctua square-frame 140x25mm fans such as the popular NF-A14 or NF-P14s redux series. Fans from other manufacturers are not supported.

Anti-vibration mounts and fan screws

The NA-IS1-14 Sx2 is a set of two spacer frames plus the matching anti-vibration mounts, fan screws and radiator screws - ideal for equipping e.g. two 140mm intake fans in the front of a PC case or two 140mm fans on a 280mm radiator that's installed in a front intake position.

Scope of Delivery

2x NA-IS1-14 chromax.black inlet spacers for 140mm fans
8x NA-AV3 chromax.black anti-vibration mounts
8x NM-SFS4-BK long fan screws
8x NM-SFS5-BK radiator screws (M3)
8x NM-SFS6-BK radiator screws (UNC)

Please note:

As influx turbulences vary between different fans models and setups, it is not possible to reliably predict how much of an improvement adding inlet spacers will make. Please see our performance guidelines for further information.

Products	NA-IS1-12 Sx2	NA-IS1-12 Sx2 chromax.black	NA-IS1-14 Sx2	NA-IS1-14 Sx2 chromax.black
Colour	Beige & Brown	Black	Beige & Brown	Black
Quantity	x2	x2	x2	x2
Fan Compatibility	Noctua 120x25mm square fans	Noctua 120x25mm square fans	Noctua 140x25mm square fans	Noctua 140x25mm square fans

The NA-IS1-14 Sx2 is a set of two 5mm thick intake side spacer frames for Noctua 140x25mm fans that can help to improve both acoustics and performance in suction or pull type applications where the fan draws air through obstacles such as grills, perforated plates, mesh panels, filters or radiators. By offsetting the fan from the obstacle, the NA-IS1 inlet spacer reduces influx turbulences, which can, depending on the application and fan model, not only improve airflow but also significantly reduce overall noise levels and make the fan sound more pleasant to the ear.

Designed to replace the fans stock NA-AVP1 anti-vibration pads, the NA-IS1-14 are compatible with all current square-frame Noctua 140x25mm fans and extremely straightforward to install: For case fan applications, either the supplied self-tapping screws or the included NA-AV3 anti-vibration mounts can be used to sandwich the spacer between the fan and the case panel. For radiator mounting, both M3 and UNC 6-32 screws are supplied. In sum, the NA-IS1-14 Sx2 set is a simple yet highly effective fine-tuning measure for suction type applications where a reduction of influx turbulence can lead to improved airflow and acoustics. The chromax. black variant is a perfect match for black chromax or industrialPPC line fans.
Caution: As influx turbulences vary between different fans models and setups (e. g. different fan speeds, grill shapes, mesh patterns, overall flow resistance, etc. ), it is not possible to reliably predict how much of an improvement adding inlet spacers will make. While the improvements are significant in most configurations, there sometimes may be little to no improvements and, in rare situations such as with particular slit-type grills, adding spacers may even lead to undesirable results with particular fan models. Please see our performance guidelines for further information.

Additional Information
First Listed on Newegg	December 16, 2022

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The Noctua NA-IS1-14 chromax.black Sx2 is a pair of 5mm inlet spacers for compatible Noctua 140x25mm fans, suited to PC builders who want to reduce intake turbulence when fans pull air through nearby mesh, filters, grills, or perforated panels.

Recommended For

PC builders using compatible Noctua 140×25 mm fans as intakes behind perforated case panels, mesh, filters or grills who want to reduce turbulence noise and potentially improve airflow.
Quiet-PC builders whose front, side or bottom intake fans produce a hum or rough sound when drawing air through a nearby case panel or filter, and who want to fine-tune fan acoustics.
Builders adding two compatible 140 mm intake fans to a front-mounted 280 mm radiator who want to test whether spacing the fans from the radiator improves their setup’s airflow or sound.
PC enthusiasts tuning a Noctua 140 mm intake for a specific restrictive-panel setup, rather than expecting the spacer to produce the same result in every case.

Real-World Use Scenarios

A 140mm Noctua front-intake fan sits close behind a perforated case panel; the spacer can reduce intake turbulence, which may make the fan quieter and improve airflow without increasing its speed.
A quiet-focused PC uses a 140mm Noctua intake fan behind a mesh panel or dust filter; the 5mm offset may soften turbulence-related noise, though the result depends on the panel, filter, fan, and speed.
A builder hears a tonal or uneven sound from a front intake fan drawing through a grille; adding the spacer may make the sound less prominent, even if temperatures change little.
A high-power PC uses a top-mounted 140mm intake positioned above the CPU cooler in a mixed top-fan layout; Noctua recommends the spacer to reduce intake turbulence, while noting the added fan setup can increase overall noise.
A 140mm Noctua fan pulls air through a water-cooling radiator; the spacer can be tried to tune its sound, but NF-A14 users should not expect a major cooling improvement, and measured results vary by fan and setup.

Item#: 9SIAADYJB31613