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.

longwell-lwcd-30150ln-06-proje
By longwell / April 13, 2026 / Engineering Case Studies

Cooling Low-Profile Enclosures: 30mm 2-Wire DC Cross Flow Fan

Discover how we modified a standard 30mm DC cross flow fan for a stric...

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longwell-wi-6954668902-project
By longwell / April 11, 2026 / Engineering Case Studies

Specifying a 24V 300mm Axial Fan for Mobile Equipment

See how we specified a 24V 300mm axial fan with 0-10V control and PA6+...

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longwell-lwad20060-project-ima
By longwell / April 11, 2026 / Engineering Case Studies

200mm 48V DC Fan Moving 1100 CFM

See how we engineered a 200mm 48v dc fan to move 1100 CFM at 5800 RPM....

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longwell-lwea150-spec-sheet-02
By longwell / April 10, 2026 / Engineering Case Studies

Adapting a Circular Window Ventilator to 2000 RPM on 60Hz

Learn how we built a 5000-unit batch of 220V 60Hz circular window vent...

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longwell-wi-6954277020-project
By longwell / April 10, 2026 / Engineering Case Studies

A 1.5kW Push Pull Exhaust Fan for Wet Evaporative Cooling

Learn why a 1.5kW push pull exhaust fan handles high static pressure f...

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longwell-wi-6953709623-project
By longwell / April 10, 2026 / Engineering Case Studies

200mm 115V 60Hz Axial Fan for 30 Pa Duty Points

Review the engineering details of a custom 115V 60Hz axial fan. This 2...

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longwell-wi-6952645907-project
By longwell / April 9, 2026 / Engineering Case Studies

HVAC Ventilation 230V 125mm Circular Duct Fan

Learn why this 125mm circular duct fan drops to 294 m3/h and uses an I...

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longwell-lwbe3g225-092ps-04-pr
By longwell / April 9, 2026 / Engineering Case Studies

Custom Centrifugal Fan Mounting Hardware for HVAC Units

We changed the centrifugal fan mounting hardware to male-female stando...

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longwell-wi-6936470257-spec-sh
By longwell / April 3, 2026 / Engineering Case Studies

Sizing a Commercial Roof Exhaust Fan for Facility Airflow

Learn how to size a commercial roof exhaust fan. We match big centrifu...

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longwell-wi-6935667693-project
By longwell / April 2, 2026 / Engineering Case Studies

125mm EC Mixed Flow Fan Engineered for 100 Pa Pressure

Discover how we built an ec mixed flow fan to hit 150 m3/h at 100 Pa. ...

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