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Ventilation Systems

Rees-Memphis Ventilation Systems are designed to continually remove and supply air to a particular area in the plant where a controlled environment is needed to eliminate physical hazards or maintain temperature and humidity conditions.

Industrial facilities may have processes that produce hazardous dusts, vapors, or gases where preventing worker exposure requires an exhaust system. The system must capture and convey the contaminants, clean the air, recover any valuable material, and prevent any further air pollution.


Contact Rees-Memphis today for your ventilation systems solution.

Factors for Design

Our system salesmen will consider many factors when designing a ventilation system including:
  • OSHA and EPA Regulations 
  • Hood Design
  • Hazard Reduction
  • Exposure Sampling
  • Air Velocity
  • Duct System Design 
  • Construction Materials
  • Fire & Explosion Hazards
  • Air Volume
  • Fan Selection
  • Filter Selection
  • Process Controls

Determining The Need

Before an industrial ventilation project is undertaken, it must first be determined if a system is needed.  One must consider the extent of the industrial hygiene and potential air pollution issues by examining the process material and equipment, and by testing air samples in the workplace or at existing exhaust stacks.

Sometimes the hazardous source can be reduced or eliminated by changing the hazardous material in a particular application, enclosing a process to prevent escape, modifying existing equipment, or by automating the production process.  If the exposure still exists after careful analysis, then an alternative system must be used to correct the problem. 

Designing The System

Ventalation Systems - Hoods, Ductwork, Fan and SeparatorIn designing a Ventilation System, there are four main components that must work together to achieve the desired outcome:  hoods, ductwork, fan, and separator.

Hoods must be designed properly to effectively contain air contaminants with consideration of capture velocity, location, and workstation limitations.  REES not only provides hoods that have been tested and proven effective, but also designs hoods that are specific to particular applications.

The ductwork system must also be effective by maintaining the required conveying velocity to prevent any settling of the material.  The duct piping and supports must also be fabricated of material which is strong enough to handle the pressure differential, the weight of the pipe system, and the weight of any material that might settle in the duct.

A fan is used to move the air and must include the proper wheel, drive components, arrangement, and size for the system to effectively operate.  It must also be compatible with the airstream and materials being conveyed.

The control device or separator can be a filter, cyclone, baghouse, electrostatic precipitator, or other special piece of equipment.  The designer must pay particular attention to the media used to filter the airstream as well as the air-to-cloth ratio of the system.