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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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PVI Series

SINCE 1948.

PVI Series

The PVI Series is a portable box fan with heavy duty intake and exhaust guards. It employs a rolled inlet powder coated venturi to improve airflow and come with a rugged heavy gauge galvanized housing. It is excellent for mechanic shops, gymnasiums, factories or any other location where portable air movement is desired.


  • Available in 36” to 60” blade diameters
  • Wide ergonomic handles
  • Two fixed and two swivel casters
  • Triangle’s automatic belt tensioner

See full specifications for sizing and performance data

View Full Specs