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-wi-6968261568-project
By longwell / April 16, 2026 / Engineering Case Studies

380V Vertical Circulation Fan for Greenhouses

See how we designed a 380V vertical circulation fan to move 5800 m3/h ...

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longwell-wi-6968586891-project
By longwell / April 16, 2026 / Engineering Case Studies

Sourcing a 380V Forward Centrifugal Fan for a 443 Pa System

Learn how we replaced an obsolete unit with a custom 380V forward cent...

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longwell-lwcd-50290mn-09-spec-
By longwell / April 15, 2026 / Engineering Case Studies

24V Cross Flow Fan: 180 m3/h Engineering Case

See how our engineers configured a custom 24V cross flow fan to delive...

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longwell-lw5-47-project-image-
By longwell / April 15, 2026 / Engineering Case Studies

200°C Steam System Exhaust: 3100 m3/h at 1280 Pa

See how we built a 2.2kW boiler induced draft fan to survive 200°C con...

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longwell-wi-6961899402-project
By longwell / April 15, 2026 / Engineering Case Studies

Outdoor HVAC Fan Motor Mounting Screws: M4x10 Lock Design

Learn how we solved severe vibration issues with custom M4x10 fan moto...

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longwell-wi-6957166748-project
By longwell / April 14, 2026 / Engineering Case Studies

15000 m3/h Fan for Cement Filter Systems

We engineered an 18.5 kW industrial centrifugal fan for a cement plant...

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longwell-wi-6957086205-project
By longwell / April 14, 2026 / Engineering Case Studies

1000 m3/h Cross Flow Cooling Fan for 800 kVA Transformers

See how a 50W cross flow cooling fan delivers 1000 m3/h. It safely coo...

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longwell-wi-6957173679-project
By longwell / April 14, 2026 / Engineering Case Studies

150mm Wide Voltage DC Fan for Window Ventilation

A customer needed a wide voltage dc fan for home windows. Read how we ...

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longwell-wi-6956337739-project
By longwell / April 13, 2026 / Engineering Case Studies

High-Volume HVAC Part Isolation and Torque Specifications

Learn how we engineered a custom rubber fan motor hub to handle 1000 N...

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longwell-lwad8025lx-29-project
By longwell / April 13, 2026 / Engineering Case Studies

Upgrading a 12V Hardware System for Higher Airflow (42 CFM)

See how we engineered a replacement 8025 DC cooling fan to deliver 42....

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