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Frequently Asked Questions View all FAQs
How do you order the correct replacement parts?

Before ordering replacement parts, make sure you have the fan model and serial number.

Where can I find instructions to wire a motor on my fan?

The nameplate of the motor includes a wiring diagram. Wiring diagrams can also be found beneath the motor image in our Buy Parts section. Simply click the wiring diagram icon to view it.

Can I install a thermostat?

Yes, but only if the thermostat has a simple on/off operation. Please note: if the thermostat varies the amount of voltage delivered, it will damage the motor and void the warranty.

Can I install my whole house fan vertically?

Comfort Cooler (CC) series whole-house fans may be mounted vertically, however, the AS and CSS shutters will not function properly in the vertical position. We do not carry a ceiling shutter for vertical installation. Vertical installation instructions.

Quality Products

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VI Series Exhaust Fans

SINCE 1948.

VI Series Exhaust Fans

Triangle’s “VI” Series Heavy Duty Industrial belt drive exhaust fans are designed to meet the exhaust airflow needs of factories, warehouses, gymnasiums, greenhouses, and other heavy-duty industrial applications. The “VI” Series Heavy Duty Industrial exhaust fans come standard with a polyester powder coated venturi to improve airflow and protect against corrosion as well as a heavy-gauge galvanized housing for corrosion resistance. Both open drip-proof (ODP) and totally enclosed (TE) “VI” models up to 1 ½ HP come equipped with Triangle’s exclusive “X-Wing” belt tensioner which reduces maintenance and extends belt and motor life.


  • Bronze powder coated rolled inlet venturi for efficient airflow
  • Rugged heavy gauge galvanized housing
  • Available in sizes from 24” to 60” blade diameter
  • Available with ODP, TE and HL motors
  • Belt drive
  • Optional Two-speed, 115V single-phase 1/3 and 1/2HP motors

See full specifications for sizing and performance data

View Full Specs

Hazardous Location Models

Hazardous location models are made to order and are not returnable.

  • No wiring
  • Non-sparking aluminum blades
  • Stationary motor mounts
  • Belt drive: single speed, Div. I, Class I, Group D & Class II, Groups F & G