Author: longwell

What-is-DIDW-Centrifugal-Fan-
By longwell / October 23, 2026 / Technical Articles

What is DIDW Centrifugal Fan?

Key Takeaways:

Read More »
How-to-Reduce-Axial-Fan-Noise-
By longwell / October 21, 2026 / Technical Articles

How to Reduce Axial Fan Noise?

Axial fans are widely used in commercial building cooling and industri...

Read More »
GB-29539-2025--Ventilating-Fan-Efficien
By longwell / October 19, 2026 / Technical Articles

GB 29539-2025: Ventilating Fan Efficiency Checklist for OEM Buyers

China's GB 29539-2025 takes effect on 1 November 2026. For OEM and sou...

Read More »
ASEAN-Green-Procurement-for-Air-Conditi
By longwell / October 19, 2026 / Technical Articles

ASEAN Green Procurement for Air Conditioners: Fan and Motor Evidence Checklist

The ASEAN Centre for Energy published a green public procurement guide...

Read More »
The-Complete-Guide-to-HVAC-Fan-Energy-E
By longwell / October 16, 2026 / Technical Articles

The Complete Guide to HVAC Fan Energy Efficiency in Commercial Buildings

Fans operate in offices, hospitals, hotels, shopping centers, data cen...

Read More »
Exhaust-Fan-Size-Guide-for-Ventilation-
By longwell / October 13, 2026 / Technical Articles

Exhaust Fan Size Guide for Ventilation Systems

Whether an exhaust fan is used to control bathroom humidity, remove ki...

Read More »
How-to-Select-a-Backward-Curved-Centrif
By longwell / October 11, 2026 / Technical Articles

How to Select a Backward-Curved Centrifugal Fan?

Choosing the right backward-curved centrifugal fan is not just about s...

Read More »
Australia-and-New-Zealand-Energy-Rating
By longwell / October 8, 2026 / Technical Articles

Australia and New Zealand Energy Rating RECAP Registration Evidence Checklist

Australia and New Zealand have moved Energy Rating product registratio...

Read More »