Day: July 14, 2026

Panel mount 250mm fan showing the axial fan blade count of five
By longwell / July 14, 2026 / Engineering Case Studies

The Customer Asked for Five Blades. The Blade Count Was Not the Point.

Four units, and a request that implied new tooling. The fix was notici...

Read More »
Cross-flow fan, 24V EC, 437mm long for an air curtain
By longwell / July 14, 2026 / Engineering Case Studies

Why an Air Curtain Uses a Cross-Flow Fan and Not a Blower

An air curtain needs a flat sheet of air across a doorway. That shape,...

Read More »
erp 2026 fan compliance
By longwell / July 14, 2026 / Technical Articles

ErP 2026 Fan Compliance Guide for EU HVAC Buyers: New Efficiency Requirements & Compliance

The European Union is implementing a more tightening regulation for in...

Read More »
Elevator ventilation fan, cross-flow type, for a passenger cabin ceiling
By longwell / July 14, 2026 / Engineering Case Studies

Ventilating an Elevator Cabin Without Creating a Draught

Passengers stand within a meter of the outlet. That single fact rules ...

Read More »
500mm condenser fan with steel impeller for an air-cooled condenser
By longwell / July 14, 2026 / Engineering Case Studies

A STEP File Request That Reveals the Whole Specification

The customer asked only for a 3D model. That single request told us th...

Read More »
High pressure axial fan, 200mm EC, IP55 rated for cabinet cooling
By longwell / July 14, 2026 / Engineering Case Studies

395 Pa From an Axial Fan, and Why We Did Not Use a Blower

A centrifugal blower makes that pressure easily. It also turns the air...

Read More »