Powerfoil® X4

legendary toughness. crafted for life.
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Powerfoil® X4

get a quote

Powerfoil® X4

Designed with the size, power and efficiency to tackle oppressive temperatures or stagnant air head on. Powerfoil X4 is perfect for spaces that need strong, durable and unmatched airflow.

Product Highlights

Powerfoil X4 is the perfect choice for facilities that require maximum airflow and long-term reliability. Its powerful, maintenance-free motor moves more air than any other HVLS fan, providing superior performance and efficiency.

Powerfoil X4 is available in diameters ranging from 4.3m to 9.1m. With the ability to move up to 118 cubic meters of air per second, Powerfoil X4 provides exceptional performance and efficiency. The fan’s airfoils feature an aerodynamic design, cuffed winglets, and AirFences™, which reduce choppy wind and noise, keeping comfort consistent throughout your facility.

Energy Usage

With Powerfoil X4’s energy-efficient motor, this fan uses minimal energy to deliver powerful airflow, creating comfortable conditions far more efficiently than air conditioning. In winter, the fan equalizes temperatures from floor to ceiling, making heaters more efficient.

By reducing existing HVAC costs by up to 30%, Powerfoil X4 pays for itself in no time. And with an estimated annual operational cost of just $1,030 per year (about $2.82 per day), you can enjoy the benefits of this energy-efficient fan without breaking the bank.

Airflow Mapping

Uncertain if Big Ass Fans products will make a difference? We get it. That’s why we created an interactive, science-based software tool that allows us to show how our fans and evaporative coolers will create energy-efficient comfort. See how we do it here.

Specs and Measurements

Discover specifications including weight, height, airflow output and sound level in the Powerfoil X4 Cutsheet here.

Warranty & Returns

The Powerfoil X4 comes with a 15 mechanical and electrical warranty when purchased with Big Ass Fans Certified Installation*. Our service department is here to assist with any technical questions you may have here.

*If no Big Ass Fans Certified Installation purchased, Powerfoil X3 comes with a 7 Year Electrical Warranty

Keeping people comfortable in tough conditions

legendary toughness

Crafted for life – dusty, harsh warehouse conditions are no match for the Powerfoil X4. With a hermetically sealed gearbox, IP56 rating, and aircraft-grade aluminium airfoils, your investment was built to withstand harsh environments and will continue to spin for years to come.

BMS Integration

Powerfoil X4 is pre-programmed for easy BMS integration, allowing you to sync up to eight fans effortlessly. Featuring SmartSense® automated modes that adjust the fan speeds based on temperature for optimal efficiency, reducing energy consumption without compromising comfort.

All-in onE Safety

At Big Ass Fans, safety is our top priority. That’s why Powerfoil X4 is designed with multiple redundant safeguards, including aircraft-grade steel safety cables, fire suppression system integration, and a mounting system that is tension-tested up to 28,000 force-pounds.

US made, local support

Our Powerfoil X4 was designed and built in our custom-made manufacturing facility in Lexington, Kentucky. Stocked locally for quick dispatch, with a Brisbane-based support team and national network of certified installers for a seamless experience.

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How we find the perfect solution

How we find the perfect solution


Size does Matter! The optimal performance of our fans is directly linked to their size and positioning within your facility. Our team visits your facility to measure and evaluate the space, ensuring you get the most out of your investment.


By combining computational fluid dynamics (CFD) with airflow data collected in our state-of-the-art Research & Development facility, our airflow experts use SpecLab® to customise and test their recommended cooling solution before it’s installed—saving you both time and money by avoiding ineffective cooling solutions.


Based on our findings, we’ll provide a full recommendation of Big Ass fans specifically designed to fit your space and address your concerns. With our personalised approach, you can trust that you’ll receive a customised solution that maximises comfort.


At Big Ass Fans, we’re committed to providing support from start to finish. That’s why we offer professional installation from our Certified Installer Network. Our team will coordinate your project from beginning to end, working around your schedule to minimise interruptions.

The Low down on HVLS fans

Discover how to boost productivity by up to 30% with HVLS Fans.

A note from our biggest fans

Feel Confident you’re buying the right fan

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Whether you have an industrial complex or a small shop, our airflow experts are here to make your life easier, more comfortable, and less expensive.