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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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QBX Series – Quiet Breeze Belt-Driven Portable Barrel Fan

QUALITYProducts.
SINCE 1948.

QBX Series – Quiet Breeze Belt-Driven Portable Barrel Fan

The QBX Series – Quiet Breeze is Triangle Engineering’s economical belt-driven portable barrel fan, designed for smooth operation, dependable airflow, and long-term durability. With vibration-reducing construction and a slim, portable footprint, Quiet Breeze™ delivers high-volume air movement while maintaining steady, controlled performance.

Available in 36″ and 42″ diameters, QBX models move up to 13,000 CFM using a ½ HP two-speed motor. The belt-driven design, combined with rubber isolated bearings, helps reduce vibration and dampen noise, making Quiet Breeze™ ideal not only for warehouses and shops, but also for garages and personal workshops where comfort and sound levels matter.

Unlike disposable imports, QBX fans are fully supported with stocked replacement parts for long service life and minimal downtime.

  • Quiet Breeze performance – rubber isolated bearings reduce vibration and operating noise
  • Economical cooling – value-focused airflow without sacrificing durability
  • Belt-driven operation – smooth, steady performance
  • Two-speed motor – adjustable high/low airflow control
  • Slim barrel design – fits tighter spaces and work areas
  • 3-blade propeller – strong, consistent air delivery
  • Large no-flat wheels – easy maneuverability without downtime from flat tires
  • 115V single-phase power – plug-and-play operation

Models

  • QBX3623 (36″)
  • QBX4223 (42″)

Airflow (CFM)

  • 36″: 11,000 / 7,600
  • 42″: 13,000 / 9,000

Motor & drive

  • ½ HP, two-speed
  • RPM: 505 / 485
  • Amps: 5.8
  • Electrical: 115V single-phase
  • Drive: Belt-driven with rubber isolated bearings

Dimensions & approximate weight

  • 36″: 40″ W × 21″ D × 40″ H – 92 lbs
  • 42″: 45″ W × 21″ D × 46″ H – 99 lbs
  • Warehouses and light industrial facilities
  • Fabrication shops and service bays
  • Workstation and assembly line cooling
  • Residential garages and home workshops
  • General air circulation and comfort cooling

Quiet Breeze is built for customers who want economical belt-drive performance without sacrificing durability or serviceability. With vibration-reducing rubber isolated bearings, strong two-speed airflow, and large no-flat wheels for easy positioning, it delivers practical cooling for both professional facilities and serious home workshops.

Every Quiet Breeze fan ships fully assembled and performance tested, so it arrives ready to roll into place and plug in, no complicated setup required.

Fully supported with stocked replacement parts, QBX fans are designed to be maintained, not thrown away.

Built in the USA with a blend of domestic and foreign components, Quiet Breeze is backed by Triangle Engineering’s decades of industrial ventilation expertise and fast parts support.

Details

  • Barrel sizes: 36"-42"
  • Economical cooling
  • Slim design
  • 3 blades
  • Two-speed motor

See full specifications for sizing and performance data

View Full Specs