Day: May 11, 2026

Fan coil unit selected despite a capacity mismatch with the brief
By longwell / May 11, 2026 / Engineering Case Studies

The Unit They Chose Was Half the Capacity They Asked For

They asked for 3 to 4 kW, then picked a 1.9 kW unit from the catalog. ...

Read More »
longwell--project-image-05-jpg
By longwell / May 11, 2026 / Engineering Case Studies

The Regulation Chose the Motor Before We Did

We usually explain why EC beat AC on the merits. In this order, the la...

Read More »
Ignition electrode specification drawing with ceramic insulator
By longwell / May 11, 2026 / Engineering Case Studies

A Photograph and a Voltage: Building a Drawing From Nothing

The brief was an image and two figures. Everything else had to be deri...

Read More »
air curtain
By longwell / May 11, 2026 / Engineering Case Studies

LWAC-BG4515S Industrial Air Curtain for 380V High Power Doors

See how Longwell addressed a request for a 380V industrial air curtain...

Read More »
DC Blower
By longwell / May 11, 2026 / Engineering Case Studies

LWBD43M 19kPa DC Blower for Medical & Precision Airflow

A compact 24V DC centrifugal blower delivering 19 kPa max static press...

Read More »
Cross-flow fan with an integrated fan guard for commercial HVAC
By longwell / May 11, 2026 / Engineering Case Studies

An Integrated Guard Beats a Bolt-On, and Not Only on Looks

A wire guard is cheap and available today. It also changes your envelo...

Read More »
what are centrifugal fans
By longwell / May 11, 2026 / Technical Articles

What Are Centrifugal Fans? A Complete Beginner’s Guide

The centrifugal fan is one of the most efficient solutions for moving ...

Read More »