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Coolerguys 12vDC Waterproof IP67 Fan (High Speed, 40x20mm)
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Coolerguys 12vDC Waterproof IP67 Fan (High Speed, 40x20mm)

Bottom line: The Coolerguys 12vDC Waterproof IP67 Fan: IP67 seal handles rain, splashes, and dust ingress, not just clean indoor air; main trade-off: high-speed 40mm fans are inherently loud; Coolerguys does not publish a dBA figure.

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

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ IP67 seal handles rain, splashes, and dust ingress, not just clean indoor air
  • ✓ 40x20mm depth is double the typical 10mm 40mm fan, moving more air per rotation
  • ✓ Standard 12V DC input works off most PSU rails and wall adapters
  • ✓ Mounting accessories included, so retrofits do not need separate hardware

Cons

  • ✗ High-speed 40mm fans are inherently loud; Coolerguys does not publish a dBA figure
  • ✗ 20mm depth may not clear shallow retro or slim NAS enclosures
  • ✗ Listing does not specify CFM, RPM, static pressure, or bearing type
  • ✗ No PWM control is stated, so speed tuning may require a separate controller

Manufacturer description

The Coolerguys 12vDC Waterproof IP67 Fan solves a problem most 40mm fans ignore: surviving moisture, dust, and splashes. At 40x20mm with a high-speed motor, this fan targets tight enclosures where a standard thin fan runs out of static pressure, making it a fit for retro PC cases, NAS boxes, amplifier enclosures, 3D printer electronics bays, and outdoor equipment cabinets. The IP67 rating means Coolerguys built it to keep working through rain, splashes, and dusty conditions rather than treating clean air as a requirement. Its 20mm depth is double the typical 10mm 40mm fan, which gives the…

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SpecPicks Verdict

SpecPicks scored Coolerguys 12vDC Waterproof IP67 Fan using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. coolerguys's retro cpu coolers & 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 retro cpu coolers & 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.

Frequently Asked Questions

Will this fan fit a standard 40mm fan mount?

The mounting face is 40x40mm, matching standard 40mm screw spacing. The difference is depth: at 20mm it is twice as thick as a common 10mm 40mm fan, so measure clearance behind the mount before ordering.

What does the IP67 rating actually protect against?

IP67 covers full dust ingress protection and immersion resistance, which is why Coolerguys markets it for rain, splashes, and dusty conditions. For any specific submersion depth or duration, check the manufacturer listing.

How loud is this fan?

Coolerguys does not publish a dBA figure for this model. It is the high-speed variant of a 40mm fan, and small high-RPM fans are audible by nature, so plan for noticeable noise in a quiet room.

What voltage and connector does it use?

It runs on 12V DC, so it works from a standard PC power supply rail or a 12V adapter. Confirm the exact connector type on the product listing before wiring it into an existing build.

Does Coolerguys make this in other sizes?

Yes. The same waterproof IP67 line is offered in 25mm, 40mm, 60mm, 80mm, 120mm, and 140mm, so you can match the fan to the enclosure instead of adapting the opening.

Key Features

  • Waterproof IP67 Rating: Our fans are built to withstand the harshest environments. Whether it's rain, splashes, or dusty conditions, these IP67-rated fans will keep your equipment safe and running smoothly.
  • Diverse Size Selection: We understand that one size doesn't fit all. That's why we offer multiple sizes, including 140mm, 120mm, 60mm, 40mm, 80mm, and 25mm, to accommodate various devices and applications.
  • Exceptional Cooling Efficiency: Coolerguys fans are designed for maximum airflow and heat dissipation, ensuring your equipment operates at peak performance even under heavy workloads.
  • Long-lasting Durability: Crafted with precision and built to last, our fans are made from high-quality materials that are resistant to corrosion and wear. You can trust them to perform reliably for years to come.
  • Easy Installation: Installing Coolerguys Waterproof IP67 Fans is a breeze, thanks to their user-friendly design and included mounting accessories. Whether you're a DIY enthusiast or a professional, you'll appreciate the hassle-free setup.

Full Specifications

Brandcoolerguys
ModelCG4020H12-IP67
Voltage12 volts_of_direct_current
Wattage9 watts
MaterialPolybutylene Terephthalate
Unit Count1 Count
Noise Level36 db
Part NumberCG4020H12-IP67
Material TypePolybutylene Terephthalate
Cooling MethodAir
Number of Items1
Air Flow Capacity12.3 cfm
Compatible DevicesYacht/Boat Systems, Exterior and Outdoor AV Systems
Included Componentsfan
Power Connector Type3-Pin
Maximum Rotational Speed11000 rpm
Item Dimensions L x W x H0.79"L x 1.57"W x 1.57"H

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Coolerguys 12vDC Waterproof IP67 Fan (High Speed, 40x20mm) 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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Coolerguys 12vDC Waterproof IP67 Fan (High Speed, 40x20mm)
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