Altra-Air Sailfin HVLS Fans

Altra-Air Sailfin HVLS fans blanket a very large area with constantly moving air to create an expansive comfort zone. As a result, this large ceiling fan can create an evaporative cooling effect of 3 to 4 degrees Celsius throughout the facility.

High Volume Low Speed Fans

The Sailfin Blade Design is a massive evolutionary step towards our most advanced airfoil yet capable of producing a 6mph breeze.

The Sailfin Advantage

Airfoils don’t change....That is unless you work with Envira-North Systems. Since 2003, we’ve continually searched, tested and modified airfoils to maximize their efficiency – solely for the purpose of moving large volumes of air a low speeds. Here’s what we’ve done:

  • Increased air speeds.
  • Reduced operating costs.
  • Decreased noise.
  • Streamlined appearance.

Sailfin represents everything users want in an HVLS Fan, it looks nice, moves a ton of air and consumes very little energy!

Sailfin Stats

12' to 24'

Diameter Fans


Varying Degree Angle
of Attack


Warranty (Blades & Hub)



Technical Specifications

  • Fans range from 3.7 to 7.3 m (12 ft to 24 ft) in diameter.
  • 6MPH breeze.
  • Maximum 5.7A draw.
  • 264 CFM/Watt
  • Variable speed operation.
  • Minimal 2.5" blade flex.
  • Up to 23° angle of attack.
  • Less torque.


Altra-Air fans come with a lifetime warranty on the blades and hub. The motor, gear reducer and VFD control panel come with a three year limited warranty.


Envira-North’s blade toppers prevent a rotor from failing in the unlikely event of a catastrophic failure of the hub or drive system. The collet-type friction drive bushing connecting the hub to the reducer shaft allows controlled slippage in the event of a seizure of the reducer mechanism, or a failure of the soft start feature in the control panel.

Frequently Asked Questions

What kind of maintenance do the Altra-Air Sailfin fans require? Does the fan create negative or positive pressure in a structure? Who will install Envira-North Systems Ltd. Altra-Air Sailfin Fans?
The blades should be cleaned once or twice a year. Once a year, mechanical connections be checked for proper tension. This also includes electrical connections in the fan controller and motor. The oil level in the gear reducer should be checked once a year. The fan does not create negative or positive pressure as it only moves air. In most cases the customer prefers to install their own fan; however Envira-North Systems Ltd. can provide installation or recommend an installer.

What is the warranty of the Altra-Air Sailfin fan? What is the cost to operate an Altra-Air Sailfin Fan? Do you have any testimonials of customers who have purchased your products in the past?
Lifetime warranty on the blades and hub, limited 3 year warranty on the gear reducer, motor and fan controller. Pennies per hour. Included in our promotional material is a list of references and testimonial letters from some of our customers.