54-Inch Fan Model

54-Inch (137.2-cm) Diameter Fan Model (Patent Pending)
Easily replace older, inefficient 48-inch fans and get 30-35% more airflow.	Interior screen mounts securely to the wall instead of to the fan, facilitating quieter operation.
BI-FLOW® Shutter doors are pushed open as air is exhausted when fan operates.	Shutter’s unique springs draw the doors closed when the fan is not in operation.
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New 54-inch (137.2-cm) diameter fan model is designed for more airflow and faster, more convenient installation.

Requires Fewer Fans for New Construction with the Great Performance of Our Popular 52-Inch Fans

Get More Airflow and Easy Installation with Retrofit Applications

Easily replace older, inefficient 48-inch fans and get 30-35% more airflow.
For new construction, uses same sidewall opening as 52-inch fan.
For replacement applications, can be mounted to rough openings from most existing 48-inch through 54-inch fans.
No need to reframe sidewalls or update wiring before installation in many cases.

Includes features common to ProTerra’s industry-leading 48- and 52-inch (121.9- and 132.1-cm) fans with BI-FLOW® Shutters

Uses heavy-gauge, galvanized steel panels with screw fasteners and a rugged, galvanized steel blade.
Available packaged individually or bulk packaged for greater shipping efficiency.
Automatic belt tensioning system maintains constant optimum belt tension on the fan’s easy-to-change belt.
Heavy-duty, cast iron, air-handler type bearings are self-aligning, prelubricated and shielded from dust and moisture.

ProTerra’s BI-FLOW® Shutter Improves Fan Performance

Delivers up to 10% more air with 75% less opportunity for air to leak through compared to a traditional louver shutter.
BI-FLOW® Doors do not suffer the typical 12-15% loss of efficiency and air speed typical of dirty louverstyle shutters, so air speed is maintained over time.
The BI-FLOW® Shutter consists of only two moving parts for greater reliability and easier cleaning.