IP Ratings

IP protection ratings for fans and motors explained, from IP54 to IP66, plus what the rating does not cover in wet, dusty or outdoor installations.

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By longwell / April 28, 2026 / Engineering Case Studies

Sizing a 6×20 Activated Carbon Filter for Air Exhaust

Learn how to size a 6x20 activated carbon filter. First, we map out th...

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By longwell / April 28, 2026 / Engineering Case Studies

Upgrading a 500mm IP55 Axial Fan for a -30°C Outdoor Cabinet

Learn how we upgraded a 500mm IP55 axial fan for a harsh outdoor enclo...

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By longwell / April 23, 2026 / Engineering Case Studies

220V Dual-Frequency Ventilator for Chemical Processes

See how we engineered an explosion proof portable fan delivering 6840 ...

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By longwell / April 23, 2026 / Engineering Case Studies

250mm Hydraulic Radiator Cooling Fan | 415V

Read how we specified a 250mm hydraulic radiator cooling fan to meet 4...

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By longwell / April 23, 2026 / Engineering Case Studies

IP55 Cross Flow Fan: 1020 CFM for Harsh Outdoor Cooling

Review the engineering choices of sizing an IP55 cross flow fan to pus...

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By longwell / April 21, 2026 / Engineering Case Studies

Cabinet Cooling 24V DC Centrifugal Fan and PWM Controller

Review the engineering constraints, trade-offs, and costs of specifyin...

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By longwell / April 21, 2026 / Engineering Case Studies

Negative Pressure Exhaust Fan: 38,000 m3/h Specification

Review a real project where we specified a negative pressure exhaust f...

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longwell-wi-6975592248-project
By longwell / April 21, 2026 / Engineering Case Studies

Transformer Cooling Fan Replacement for 220V Dry-Type Units

See how we built a 220V transformer cooling fan to replace old GFDD420...

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By longwell / April 17, 2026 / Engineering Case Studies

Electronics Enclosure Cooling: Achieving 191 m³/h Under 475mm

Learn how we modified a standard DC cross flow fan with an iron safety...

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By longwell / April 17, 2026 / Engineering Case Studies

24V Chassis Fan: Upgrading to Nitrile Rubber Supports

See how a pure nitrile rubber sleeve stops failures in a DC cross flow...

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