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AC Infinity AXIAL 1751, Quiet Muffin Fan, 120V AC 172x150x51mm High Speed | High Speed, UL-Certified for DIY Cooling Ventilation Exhaust Projects
AC Infinity

AC Infinity AXIAL 1751

Bottom line: The AC Infinity AXIAL 1751: High 211 CFM airflow at 2800 RPM for demanding exhaust jobs; main trade-off: loud at 52 dBA; too noisy for quiet rooms or living spaces.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ High 211 CFM airflow at 2800 RPM for demanding exhaust jobs
  • ✓ Dual-ball bearings rated for a 67,000-hour lifespan
  • ✓ UL-certified 120V AC fan, mountable in any direction
  • ✓ Ships with power cord, two fan guards, and mounting screws

Cons

  • ✗ Loud at 52 dBA; too noisy for quiet rooms or living spaces
  • ✗ High-speed model runs full-tilt with no built-in speed control
  • ✗ Large 172mm frame needs generous mounting clearance
  • ✗ AC-powered only; not for 12V DC or PWM fan headers

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SpecPicks Verdict

SpecPicks scored AC Infinity AXIAL 1751 using a rating × review-volume × price-fit model applied to published specs and reviews across the cooling & fans category. AC Infinity's cooling & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cooling & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Designed for projects that requires cooling or ventilation; or as a replacement fan for various products.
  • Includes a heavy-duty aluminum fan with power plug cord, two fan guards, and mounting screw set.
  • UL-certified fan with dual-ball bearings has a lifespan of 67,000 hours. Can be mounted in any direction.
  • High Speed: This model is designed to maximize airflow and can be too loud for some applications.
  • 172 x 150 x 51 mm (6.8 x 5.9 x 2 in.) | 100 to 120V AC | Airflow: 211 CFM | Noise: 52 dBA | Speed: 2800 RPM

Full Specifications

BrandAC Infinity
ModelHS1751A-X
Voltage120 volts
Wattage47 watts
MaterialCopper
Dimensions172 x 150 x 51 mm
High SpeedThis model is designed to maximize airflow and can be too loud for some applications.
Unit Count1 Count
Noise Level52 db
Part NumberHS1751A-X
Material TypeCopper
Cooling MethodAir
Number of Items1
Number of Packs1
Air Flow Capacity211 cfm
Compatible DevicesServer
Power Connector Type4-Pin
Maximum Rotational Speed2800 rpm
Item Dimensions L x W x H6.77"L x 5.91"W x 2.01"H
Full listing titleAC Infinity AXIAL 1751, Quiet Muffin Fan, 120V AC 172x150x51mm High Speed | High Speed, UL-Certified for DIY Cooling Ventilation Exhaust Projects

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AC Infinity AXIAL 1751, Quiet Muffin Fan, 120V AC 172x150x51mm High Speed | High Speed, UL-Certified for DIY Cooling Ventilation Exhaust Projects is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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AC Infinity AXIAL 1751, Quiet Muffin Fan, 120V AC 172x150x51mm High Speed | High Speed, UL-Certified for DIY Cooling Ventilation Exhaust Projects
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