This website uses cookies primarily for visitor analytics. Certain pages will ask you to fill in contact details to receive additional information. On these pages you have the option of having the site log your details for future visits. Indicating you want the site to remember your details will place a cookie on your device. To view our full cookie policy, please click here. You can also view it at any time by going to our Contact Us page.

VSDs vs EC fans

Author : Oliver Woolley, ABB

01 December 2021

Oliver Woolley, ABB HVAC Key Account Manager, discusses the merits of variable speed drives in HVAC applications, and how they stack up against EC fan technology.

Electronically commuted (EC) fans are a motor and drive package that are integrated together as a single assembly. They’re an increasingly popular option in HVAC applications, due to their perceived efficiency, particularly at full load. From an OEM engineering perspective, EC fans can be installed at ease as one complete packaged solution. Against the backdrop of sustainability and ecodesign regulations, on paper, EC fans might sound like a compelling option. After all, why buy multiple devices (fan, VSD, motor) when you can buy one? However, in line with current EU EMC regulations, any variable speed product (AC or DC) needs to adhere to the power drive systems standard, EN61800-3 (PDS), to be compliant.

It is also key that any integrated variable speed product in the mechanical package is linked to the electrical requirements in your specification for VFDs, and that declarations of conformity are required in accordance with EN61800 for electrical safety (-5-1) and EMC (-3).

EC fans have become a de facto guarantee for efficiency, but to what extent is this really true?

Read the full article in DPA's December issue

Contact Details and Archive...

Print this page | E-mail this page