How Fan Arrays Work

Multiple Fans, One Coordinated Airflow System

Rather than relying on a single large fan, a fan array distributes airflow generation across a number of smaller fans arranged within a shared frame or plenum. This arrangement is engineered around the airflow, static pressure, dimensional, and access requirements of the specific application.

Because the fans operate as a coordinated group, fan array systems can be configured with control strategies that adjust airflow output, respond to changing system demand, and support various installation footprints — particularly useful in retrofit projects where existing equipment openings and structural constraints must be respected.

Modular commercial fan array system installed in an air-handling unit

Modular Fan Array

Potential Advantages

Design Benefits of Modular Fan Arrays

The specific advantages of a fan array configuration depend on system design and project goals. Common considerations include:

Modular Construction

Multiple smaller fans can be arranged to fit available space and airflow requirements more flexibly than a single large fan.

Equipment Redundancy

Multi-fan configurations can be designed with redundancy considerations depending on the application and system design.

Improved Serviceability

Individual fans within an array can potentially be serviced or replaced without requiring a full system shutdown, depending on design.

Flexible Installation

Modular fan arrangements can be configured to fit a range of equipment footprints and access conditions.

Airflow Control

Multi-fan systems support control strategies that can adjust output across the array to match system demand.

Retrofit Flexibility

Fan array configurations can be developed to fit within the physical constraints of existing AHUs and cooling towers.

Configuration Options

Fan count, motor type, and mounting configuration can be selected based on the requirements of the project.

Controls Integration

Fan arrays can be paired with HVAC control systems for coordinated operation and monitoring where supported by the equipment.

Applications

Where Fan Arrays Are Applied

AHU Retrofits

Replacing an aging single fan or fan section within an existing air-handling unit with a modular fan array configured to fit the existing unit footprint and ductwork connections.

New Equipment Applications

Incorporating fan array systems into newly designed air-handling equipment where multi-fan configurations meet project airflow and layout goals.

Commercial Ventilation

Supporting ventilation requirements in office buildings, institutional facilities, and other commercial properties.

Industrial Ventilation

Meeting higher-volume airflow demands common in industrial facilities and process environments.

Design Inputs

What Shapes a Fan Array Configuration

Every fan array project is developed around the specifics of the application rather than a fixed, one-size-fits-all design. Typical inputs include:

Space & Access

Available footprint, service clearances, and installation access points

Airflow

Required air volume for the application

Static Pressure

System resistance the fan array must overcome

Electrical Requirements

Available power supply and motor configuration needs

Control Strategy

Local, automatic, or building-automation-integrated operation

Existing Equipment

Dimensions and connection points of equipment being retrofitted

Discuss a Fan Array Project

Share your application details, existing equipment dimensions, or drawings and our team will help scope the right configuration.

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Modular Fan Array Systems