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Roof Vent Types: Choosing the Right Rooftop Ventilator

Grainger Editorial Staff

Roof ventilators are used in all types of commercial, institutional, and industrial buildings in applications from comfort ventilation to manufacturing processes. In fact, roof ventilators may even help extend the life of a building by providing proper airflow. So how do you know which rooftop ventilator is the right one for your building? You can start by answering these 3 questions:

  1. In what type of building will the product be installed (e.g. Automotive Shop, Hospital, School, Warehouse)?
  2. What function should the product perform (e.g. General Exhaust, Condensation Control, Grease Producing Cooking, Recirculate Air, Supply Air)?
  3. Where will the ventilation equipment be installed (e.g. Ceiling, Indoor, Inline, Roof, Wall)?

After you've answered these questions, you should be able to narrow down your choices. But there's one additional factor you should consider before making your final decision: Energy efficiency. Energy-efficient ventilators feature variable-speed motors that provide you the flexibility to turn the ventilator speed down in areas of low occupancy, or up if there's higher occupancy. This helps reduce energy use and cost.

Now that you are ready to choose a rooftop ventilator, check out the types of rooftop ventilators and their recommended applications below:

Downblast Roof Ventilators are designed for situations requiring a steady exhaust or supply of air under low-to-high static pressures. These ventilators are used to exhaust generally clean air. Applications: Office Buildings, Restaurants, Schools, Manufacturing Facility and Warehouse.

Upblast Roof Ventilators are designed to direct contaminated air directly away from the roof or wall surface. Most sizes are listed UL-762 for commercial kitchen applications. Applications: Hospitals, Office Buildings, Restaurants, Schools, Manufacturing Facility and Warehouse

Hooded Exhaust Fans help purify the air from pollution and excessive heat. Exhaust fans should be installed as close to the ceiling as possible to catch any hot air that rises. Exhaust fans also help eliminate humidity by exhausting moisture, helping to eliminate mold and reduce odors. Applications: Hospitals, Manufacturing Facility and Warehouse

Emergency Smoke Exhaust Ventilators are designed to remove smoke and heat from buildings in the event of a fire. Installing these types of ventilators help increase occupant safety and can allow rescue personnel to safely enter burning buildings. Applications: Office Buildings, Manufacturing Facility and Warehouse.

Wind-Driven Turbine Ventilators help remove hot attic air in summer and moisture-laden air in winter. The turbines rotate as the wind blows to create a strong upward draft that draws inside air up and out. Applications: Rooftop Ventilator Accessories include adjustable, as well as ventilated bases, round-to-square base adapters, hinge kits, grease collector boxes and more. A variable-speed power pack can convert your existing centrifugal upblast exhaust ventilator into an energy-efficient, variable-speed direct-drive upblast exhaust ventilator. Applications: Hospitals, Office Buildings, Restaurants, Schools, Manufacturing Facility and Warehouse.

Now that you know more about rooftop ventilators, you can pick the right one for your facility. This will ultimately create an ideal climate in your facility while keeping your employees comfortable.

The information contained in this article is intended for general information purposes only and is based on information available as of the initial date of publication. No representation is made that the information or references are complete or remain current. This article is not a substitute for review of current applicable government regulations, industry standards, or other standards specific to your business and/or activities and should not be construed as legal advice or opinion. Readers with specific questions should refer to the applicable standards or consult with an attorney.

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