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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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Powered by Mother Nature. Cooled by Triangle Engineering.
Powered by Mother Nature. Cooled by Triangle Engineering.

SINCE 1948.

Spotlight: Karmen’s Garden & Greenhouse

Karmen’s Garden and Greenhouse, based in Grass Valley, California, offers custom greenhouses that feature exhaust fan kits manufactured by Triangle Engineering. Each greenhouse is customized to fit specific plant needs. Both structurally sound and built for the elements, these greenhouses are built to last for countless growing seasons. A greenhouse takes considerable preparation and design knowledge to meet specific growing needs. 

Triangle Engineering’s combination of durability, airflow, and energy efficiency have led to many successful installations. The VIK series is the perfect choice for optimal ventilation in a greenhouse or any commercial or industrial building.

Brian Radcliff, Karmen’s Garden & Greenhouse, Grass Valley, California

Custom made-in-the-USA greenhouses

The experts at Karmen’s Garden and Greenhouses believe that the climate control achieved with Triangle’s VIK Series belt drive exhaust fans is a major contributor to a successful harvest. Visit to learn more about custom made-in-the-USA greenhouses.

Ships fully assembled and ready to install

All VIK series fans come standard with installed shutters for protection against weather and corrosion and OSHA-compliant safety guards. VIK fans are available with blade diameters from 24” to 60”. ODP and TEFC are 1/2HP – 5HP motors.