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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.

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Model Number Explanation

SINCE 1948.

Our Part Numbers are Meaningful

In fact, the alpha-numeric model number system reveals almost all of the information that differentiates one fan from the next. The model number will tell you: fan series, type of ventilation (supply or exhaust), number of speeds, blade diameter, horsepower, motor type, and voltage and phase.

The Triangle Part Number Deconstructed: RVI4815T-X

  • The two-four character alpha code at the beginning indicates the Fan Series (V, VI, VID, VIK).
  • Model numbers beginning with “R” denote a supply fan, those without an “R” present signify exhaust fan.
  • The two-digit number following the alpha code indicates the fan blade diameter
  • Next, the number of speeds the fan offers will be indicated with a “1” for single speed, a “2” for two speed and so on.
  • The final numeric character indicates the fan’s horsepower. The numeric characters 1-9 are matched with horsepower 1/4HP- 5HP.
  • Alpha characters are assigned to motors with horsepowers ranging from 7 1/2 – 25.
  • The motor type is designated by “T” for totally enclosed motor, “HL” for a hazardous location motor or no letters or blank indicates open drip motor.
  • The last alpha code U-Z found after the “-” at the end of the alpha-numeric codes indicates voltage and phase. Fans not available with different voltage and phase options will have no alpha code at the ends.

Still have Questions about Triangle Engineering’s Model Numbers?

No problem. We are here to help. Call 501-982-7558 M-F 8 am-4:30 pm CST or email Customer Service at any time. Questions will be answered in the order they are received during our normal hours of operation. Please note we are closed for most but not all federal holidays.