Nothing Moves Air Like This.

Patented airfoil technology and a maintenance-free NitroSeal™ gearbox — Powerfoil X4 sets the standard everything else gets measured against.

Key Features

IP56 Rated

Dust, debris, high-pressure water jets — Powerfoil X4 shrugs them all off.

Feel 10° Cooler

Patented airfoil technology delivers smooth, consistent airflow that makes people feel 10 degrees cooler.

Under 55 dBA

The quietest gear-driven fan in its class.

Up to 15% More Productive

Cooler, more comfortable people work better. Powerfoil X4 helps increase worker retention and deliver up to 15% more productivity.

The Gear-Driven Advantage

Powerfoil X4 uses a NitroSeal™ gearbox — perfect for facilities where torque and durability matter most. Pressurized with nitrogen gas, it requires no oil changes, no oil degradation, and no contamination — ever. Maintenance-free by design, with less than 1% failure rate.

More torque, more airflow across large industrial spaces
Under 55 dBA — industrial power without the noise penalty
Consistent, stable performance day after day in high-demand environments

Patented Airfoil Technology

Powerfoil X4's performance starts with its uniquely engineered airfoils. Inspired by airplane wing technology, each blade is shaped with a precise angle of attack to generate massive airflow with exceptional efficiency. Three patented features work together to deliver stronger, more focused airflow exactly where it's needed.

Airfoil — Aerodynamic profile modeled after aircraft wings to move extreme volumes of air with minimal energy use
Airfence® — Redirects airflow down into the occupied zone instead of letting it spill off the tips
Winglet — Cuts cleanly through the air to reduce drag and boost overall efficiency

Safety You Can Trust

Big Ass Fans pioneered the HVLS fan in environments with people by creating the safest fans in the market. Our patented safety features are developed to eliminate the failure points that can result from adjustable extension tubes, snap-in blades, and smaller hubs — the weak spots other fans live with.

Because Downtime Costs Money

In the unlikely event your Powerfoil X4 motor ever needs replacing, you won’t have to dismantle the entire fan. The offset motor is designed for simple replacement with just four screws — no costly shutdowns, no complicated teardown, no unnecessary disruption to your operation.

Control Options

Wired Standard Controller

Included with every fan. Smooth, variable-speed control through an easy-to-use OLED touchscreen. Add optional passcode protection to limit access and keep your settings secure.

BAFCon Controller

Upgrade to BAFCon for integrated SmartSense™ technology that automatically adjusts fan speeds based on your temperature preference. Connect up to 24 Powerfoil X4 fans and integrate seamlessly with your existing BMS through a durable touchscreen interface.