Brady partners with Mainstream, a leading fan array manufacturer, to provide innovative solutions for air handling unit replacement and retrofit projects in central and eastern North Carolina. Our focus is on building long-term relationships with our customers by exceeding expectations and contributing to a more sustainable future. Our partnership with Mainstream reflects this commitment, and we are dedicated to promoting their innovative fan arrays for a greener future. These fan arrays are an excellent solution for retrofitting air handling units, replacing fan systems, and improving building performance.

IntelliCUBE XL is Mainstream’s solution for larger fans, greater flows, and higher pressures. The array has a welded, structural steel frame designed to stack six or more fans high. The cubes are easy to install and come with powder-coating for added protection.

This design is particularly useful for applications that require larger fans and higher pressures. Each array undergoes factory testing and includes a power distribution panel for single-point power and control, ensuring easy installation.

IntelliCUBE DW is Mainstream’s double-width, double-inlet fan array (DWDI) that provides an excellent option for replacing DWDI housed fans. The cubes are enclosed and secured back-to-back, with one open side that can be connected to the existing supply duct discharge.

This fan array is particularly useful in applications where open plenum fans are not feasible. For example, if a housed fan is located too close to a coil, adding a plenum fan would be too close for comfort. However, the DWDI design ensures that the inlets of the fans remain perpendicular to the airflow, making it an ideal solution.


Mainstream’s IntelliWALL is a bulkhead design that offers an excellent solution for retrofitting smaller air handling units. The array comes with galvanized steel panels that can be bolted together to form the bulkhead, and the fans are shipped separately to be bolted onto the bulkhead on site. Additionally, the array is factory-tested and comes with a power distribution panel for single-point power and control, making installation a breeze.

Mainstream offers two options for commercial fan sections: the MLR Series, which is a semi-custom design that incorporates many of our innovative features into your existing air handler, and the MLRa Series, which is fully customizable.

The commercial fan sections are designed to provide easy access to components that require frequent servicing, and the sections are easy to install and fit through doorways. Fan sections are highly energy-efficient, resulting in significant cost savings.

If you’re looking for energy-efficient and sustainable solutions for your air handling unit replacement or retrofit project, consider choosing Mainstream fan arrays. As a trusted partner, Brady is here to help you every step of the way. Contact us today to learn more about how we can help you achieve your sustainability goals.

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