Retrofitting

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Upgrade Existing Air Handling Units with Efficient Direct-Drive Fan Technology

AHU Retrofit Solutions with EC Fans

We support AHU retrofit projects by replacing traditional belt-driven or aging fan systems with efficient EC centrifugal fans and modular Fan Wall configurations.

EC Fan Retrofit
Fan Wall Solutions
Technical Selection Support

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Common Challenges in Existing AHU Systems

Older AHUs often face high energy consumption, belt maintenance, limited speed control and inefficient airflow performance.

High Fan Energy Consumption

Existing AHU: Traditional AC motors and belt-driven systems may consume more energy, especially under partial-load operation.

Recommended Retrofit: EC centrifugal fans combine efficient motors with variable-speed control to better match actual airflow demand.

Belt & Pulley Maintenance

Existing AHU: Belt-driven fan systems require regular tensioning, alignment and mechanical maintenance.

Recommended Retrofit: Direct-drive EC fans eliminate belts and pulleys, reducing mechanical components and routine maintenance requirements.

Limited Airflow Control

Existing AHU: Fixed-speed or mechanically controlled fans cannot easily adapt to changing building airflow demand.

Recommended Retrofit: Variable-speed EC fans allow airflow to be adjusted according to system operating conditions.

Single-Fan Failure Risk

Existing AHU: Large single-fan systems may lose significant airflow if the main fan is unavailable.

Recommended Retrofit: Modular Fan Wall configurations distribute airflow across multiple fans and provide greater system flexibility.

AHU Retrofit Applications

EC fan retrofit solutions can be applied to commercial, industrial and institutional air-handling systems requiring improved airflow control and simplified maintenance.

Belt-Driven AHU Fan Replacement

Traditional belt-driven centrifugal fans can be replaced with direct-drive EC plug fans to simplify the drive system and improve controllability.

Key Features:

Direct Drive: No belts or pulleys.Variable Speed: Flexible airflow adjustment.Simplified Maintenance: Fewer mechanical components.

EC Fan Wall Retrofit

Multiple EC plug fans can replace a large single fan to create a modular Fan Wall with flexible airflow capacity.

Key Features:

Modular Design: Flexible fan quantity and capacity.Redundant Airflow: Multiple fans share system load.Easy Service Access: Individual fans can be serviced separately.

Airflow & Blower Systems

Compact centrifugal blowers can provide controlled airflow and pressure for equipment that requires focused or ducted air movement.

Key Features:

Higher Pressure: Suitable for restricted airflow paths.Compact Structure: Easy integration into small systems.Wide Speed Range: Different performance levels available.

Equipment Cooling Modules

Fans can be integrated into cooling modules, heat exchangers and enclosed equipment to support internal airflow and heat removal.

Key Features:

Flexible Integration: Suitable for different cooling layouts.Axial & Centrifugal Options: Match different airflow requirements.Multiple Motor Technologies: Available for different electrical designs.

Fan Technologies for AHU Retrofit

Explore ebm-papst EC centrifugal fan technologies for direct-drive AHU upgrades and modular Fan Wall systems.

RadiPac Series

High-Efficiency EC Plug Fans

RadiPac EC centrifugal fans integrate impeller, motor and electronics into a direct-drive fan system suitable for AHU retrofit and Fan Wall applications.

Fan Type	EC Centrifugal Plug Fan
Applications	AHU Retrofit / Fan Wall / Air Handling
Key Advantage	Direct Drive & Variable Speed

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Compact Centrifugal Blowers

Compact Airflow & Pressure Solutions

Compact centrifugal blowers are suitable for applications that require focused airflow, higher pressure or airflow through restricted internal channels.

Fan Type	Centrifugal Blower
Applications	Equipment Airflow / Ducted Cooling / Electronics
Key Advantage	Higher Pressure & Compact Design

Request Datasheet

Planning an AHU Fan Retrofit?

Send us your existing fan model, airflow, static pressure, motor power and installation dimensions. Our team can help review suitable EC fan retrofit options.

Get Retrofit Support

AHU Retrofit Support from Selection to Supply

We support retrofit projects with existing fan assessment, operating-point review, EC fan selection and replacement supply.

Existing System Review

Provide the original fan model, airflow, pressure and motor information for initial assessment.

Operating Point Matching

We review airflow and static pressure requirements to help select suitable EC fan options.

Retrofit Supply Support

Support for individual fan replacement, multiple-fan configurations and Fan Wall retrofit projects.

Frequently Asked Questions

Common questions about AHU fan retrofit and EC fan upgrades.

Can a belt-driven AHU fan be replaced with EC plug fans?

Yes. Many AHU retrofit projects replace belt-driven centrifugal fans with direct-drive EC plug fans, subject to airflow, pressure, dimensions and system conditions.

What information is needed for an AHU retrofit?

Existing airflow, static pressure, fan model, motor power, installation dimensions and operating conditions are useful for fan selection.

What is a Fan Wall?

A Fan Wall uses multiple smaller fans operating in parallel instead of one large fan, providing flexible airflow capacity and modular configuration.

Why use EC fans for AHU retrofit?

EC fans combine efficient motors, integrated electronics and variable-speed operation in a direct-drive configuration.

Can you help select replacement fans?

Yes. Send us the existing fan data or AHU operating requirements and we can help review suitable options.

Reliable Support for AHU Retrofit Projects

From existing fan identification to performance matching and replacement supply, we support AHU upgrade projects with suitable fan solutions and technical selection.

Wide Range of Fan Models

Fast Global Delivery

Support for OEM & Replacement Needs

A successful AHU retrofit starts with the right airflow and operating point.

We help simplify fan selection and sourcing.

Ready to Upgrade Your Existing AHU?

Provide your AHU operating data or existing fan information and we can help review EC fan and Fan Wall retrofit options.

Industrial Cooling Solutions

AHU Retrofit Solutions with EC Fans

Common Challenges in Existing AHU Systems

High Fan Energy Consumption

Belt & Pulley Maintenance

Limited Airflow Control

Single-Fan Failure Risk

AHU Retrofit Applications

Belt-Driven AHU Fan Replacement

EC Fan Wall Retrofit

Airflow & Blower Systems

Equipment Cooling Modules

Fan Technologies for AHU Retrofit

RadiPac Series

Compact Centrifugal Blowers

Planning an AHU Fan Retrofit?

AHU Retrofit Support from Selection to Supply

Existing System Review

Operating Point Matching

Retrofit Supply Support

Frequently Asked Questions

Reliable Support for AHU Retrofit Projects

Ready to Upgrade Your Existing AHU?

Send Us Your AHU Retrofit Requirements

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