Commercial Products  >  Fans & Ventilators
Box Fans

Do you need an exhaust solution to eliminate lint-laden air from a central laundry facility? Or for the bathrooms, kitchens or clothes dryer in a multi-story apartment building? These applications need a reliable source of combustion air/make-up air. Especially if there are multiple appliances on multiple floors, duct design issues (elbows, long runs, etc.), or possible code violations.

Simplify these challenges with the ENERVEX BEF Box Fan. This high-efficiency ventilator has a backward curved centrifugal impeller and complete insulation, designed to reduce noise and condensation in both intake and exhaust appliances. Simply install the BEF Box Fan at the exhaust duct termination point to ensure a negative pressure in the entire duct system – or inline. 


  • Electro-commutated motor for optimal performance and efficiency (EDrive included)
  • Meets US Department of Energy 2016 Motor Efficiency Requirements
  • Capacities of 250 to 12,000 CFM (425 to 20,400 m3/h)
  • Insulated aluzink steel housing & aluminum impeller (316L Stainless Steel optional)
  • Backward-curved impeller
  • Temperatures up to 400°F/200°C
  • Extremely low noise level
  • Certified for indoor and outdoor installation
  • Complete fan and control package available from a single manufacturer
  • Low operating costs


Capacities 0-12,000 CFM (0-20,400 m3/h)
Material    Galv. Steel Housing and Aluminum Impeller
Drive Backward-curved Impeller
Motor EC-Motor, TEFC, Class H w/insulated rotor/shaft grounding system
Motor Control EDrive MSC Controller
Max. Temp 400°F (200°C)
Warranty 2-Year Factory Warranty
Listings UL 705 Standard for Power Ventilators with special consideration for venting lint-laden air from single or multiple dryers.
CSA C22.2 No. 113-12 Fans and Ventilators, Edition 9

MSC Motor Controller

A full featured, industrial-type motor controller programmed specifically to control and adjust the speed of ENERVEX fans and ventilators using Electronically Commutated (EC) Motors or Induction Motors. 

Modulating Pressure Controller

A sophisticated multi-use draft and pressure controller with integrated webserver and remote access used with fans and dampers to monitor and maintain a constant pressure in commercial boiler and building applications.

Modulating Pressure Control (multi-story)

A modulating pressure control that provides superior pressure control in single- or multi-story building applications such as clothes dryers, bathrooms and kitchens.