Day: July 21, 2026

Forward-curved centrifugal blower after an EC motor retrofit
By longwell / July 21, 2026 / Engineering Case Studies

Keep the Scroll, Change the Motor

The aerodynamics already worked. Everything difficult about this proje...

Read More »
Free cooling fans replacing air conditioning in a telecom shelter
By longwell / July 21, 2026 / Engineering Case Studies

Four Thousand Towers Stop Paying for Refrigeration

An air conditioner refrigerates a room. Most equipment does not need a...

Read More »
LWCA cross flow fan
By longwell / July 21, 2026 / Engineering Case Studies

Custom 2300 RPM Cross-Flow Fan for 2300W Air Curtain Heaters

An OEM required a 2300 RPM cross-flow fan for a 2300W air curtain. Lon...

Read More »
LONGWELL duct fan
By longwell / July 21, 2026 / Technical Articles

How to Install a Duct Fan: Step-by-Step Guide

The ducts in HVAC systems are usually long. When the airflow goes thro...

Read More »
poultry fan
By longwell / July 21, 2026 / Engineering Case Studies

LWPVL-1270T Poultry Barn Exhaust Fan for 51,000 m³/h Airflow

Case study on a high-volume ventilation solution for poultry barns, de...

Read More »