RoboVent Blade® : High-Volume, Low-Speed Fan

Clean Air Matrix

RoboVent engineers are experts in every category of air filtration and ventilation. The four categories below represent the major options for treating your contaminated air. RoboVent has designed solutions for each of these categories and has manufactured air filtration systems of unrivaled quality.

For more information about these categories, see Indoor Air Quality 101.


Large blowers and air filtration equipment draw contaminated air from the plant (typically at the ceiling level), filter it and return it to the plant. This is a proven solution in plants welding large parts with overhead cranes. It reduces the haze in the air, resulting in a cleaner working environment, with no negative pressure or heat loss.


Air in the immediate area of the welding activity is captured in a hood system, then filtered and returned to the plant. This is the best solution whenever possible. It allows for a more flexible system and removes the smoke directly from the operator's breathing zone. There are many types of source capture, including overhead hoods, crossflow hoods, fume arms and fume guns, some of which work better than others.


Large exhaust fans draw contaminated air from the plant and exhaust it directly into the environment, typically through the roof or walls. This is a traditional method and often results in negative air pressure. Also, it is very difficult to climate-control your plant and the system may not work well in the winter.

Air in the immediate area of the welding activity is captured in a hood, sent through ductwork, and exhausted directly into the environment. This is a lower capital cost alternative to filtration, but tends to result in high operating costs and large, unsightly ducting systems that work less efficiently with modifications. It also results in negative pressure problems.

The RoboVent Blade®, a high-volume, low-speed fan, is changing the way industrial and commercial buildings are ventilated. They're an excellent primary ventilation system in certain open-air facilities such as agricultural buildings, sheds and stadiums; and they're an excellent supplement to existing HVAC systems in a wide range of large, open spaces such as warehouses, distribution centers, processing plants, retail centers, athletic facilities and elsewhere.

RoboVent Blade fans are powerful, quiet and efficient at moving large volumes of air. During winter months our fans improve the distribution of warm air, and during the summer months, in reverse operation they circulate cool air more effectively. The results are increased comfort for building occupants while lowering the energy usage typically required for big spaces, especially for building with overhead doors or truck bays that cause a constant and expensive drain on HVAC systems.

Why Specify RoboVent BLADE Fans

  • Lower energy usage through more efficient distribution of
    warm or cool air
  • Creates more constant floor-to-ceiling temperatures
    to increase comfort
  • Innovative design and construction is virtually maintenance-free
  • Quiet and efficient, improves building conditions
  • Can reduce or eliminate costly ductwork
  • Inexpensive to operate

Designed For Safety

Special care has been taken to design and build a fan with safety features that prevent the rotor or blades from falling in the unlikely event of a hub or drive system failure. 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.

Guaranteed Against Defects

RoboVent Blade fans are backed by a lifetime warranty on the blades and hub. The motor, gear reducer and VFD control panel are covered by a three year limited warranty.



RoboVent BLADE Fans Improve Indoor Environments

The integration of a slow moving air mass in your facility offers numerous benefits including:

  • Increased comfort during warm weather. Air temperature can feel 5 to 10 degrees cooler.
  • Lower energy consumption. Regulating temps consistently from floor to ceiling allows you to raise thermostat settings and save on energy.
  • Increased comfort during cold weather. Large-scale air movement balances hot and cold air zones.
  • Less condensation and humidity. Circulating air efficiently helps reduce dampness. Drier floors help to improve safe conditions.
  • Better air quality. Blade fans can help to improve air quality through improved air circulation.


The Difference Is In The Design

The RoboVent Blade fan works better because of an innovative design. The fan's five blades are set at a specific angle to create an optimal balance between the volumes of air moved with the power required to do so. The result is a fan that generates greater lift with lower drag and a very quiet operation.

  • Fans available from 8(2.44m) to 24(7.32m) feet in diameter
  • Capable of moving nearly 400,000 CFM
  • Fans operate on just 1 to 2 HP
  • Creates a non-disruptive airflow