Understanding Natural Gravity Ventilation’s Impact

Understanding Natural Ventilation

Natural ventilation is an old technology that has returned to the limelight as a result of the increased focus on green construction and green energy. So, what is natural gravity ventilation’s impact, and how does it work?

Much as the name suggests, natural ventilation is a process by which a building is kept at a comfortable temperature by using the natural flow of air. With a ventilation system that exhausts air naturally, the air leaves the building through vents in the roof and not through powered equipment.

The key to the system’s success is nature’s desire to keep equal pressure on both the inside and outside of a building. When warm air rises and the air is pulled in from vents at the floor level to fill the void. In turn, the air coming in also pushes the warm air up, perpetuating the cycle or air-flow.

How Could Your Business Benefit From Gravity Ventilation’s Impact?

Almost every type of facility can benefit from natural ventilation. While the extent of its use may depend on climate, industry, and building layout, it will work in some capacity in every type of plant. Although it isn’t as useful in a break room or control booth, it is very useful on a shop floor. Some types of facilities that can benefit from natural ventilation systems include.

• Metal foundries and mills: These industries require very high temperatures in order to melt and forge metals. A natural system would allow the intense heat to flow naturally upward and out of the building, creating a more comfortable temperature inside of the structure. A natural system also directs harmful fumes outside and away from employees.
• Power plants: Many electrical plants produce high temperatures and/or fumes. A new system means a safer, more comfortable building with greatly reduced or no cooling costs.
• Industrial and data facilities: Fumes from chemical or plastic production is both a fire and health hazard. Likewise, naturally high temperatures in a data facility could lead to system meltdowns. Gravity roof ventilation greatly reduces these risks by regulating the airflow naturally, efficiently removing both excess heat and fumes from the building.
• Wood and paper plants: The predominant concerns of such facilities are heat and moisture. In addition to drawing heat out of the building, gravity ventilation creates an outlet for humidity, reducing condensation and the risk of structural corrosion or damage to the product.

Installation Considerations

There are several options for gravity ventilators. The best option is largely dependent upon the size and function of your building. Warehouses and other spaces with large, open areas and open spaces can use gravity roof ventilators.

A major consideration is the design of the building. Every bay, window, door or another opening in the outer walls will affect airflow. Likewise, man-made and natural objects around the building may affect the air currents. How the building is oriented will affect the time and scope of afternoon temperature changes. Internal obstacles, such as walls or large-scale equipment, may further hinder air circulation.

Finally, your geographical location plays a major role in how the gravity roof ventilation system should be designed for your building. Local weather patterns and average temperatures both play major roles in the efficiency of a natural ventilation system.

Learning More About Gravity Ventilation’s Impact

Moffitt designs, manufactures, and installs natural ventilation, pressure gravity ventilation, and powered ventilation systems all over the world. They use the latest in Computational Fluid Dynamics (CFD) Modeling to determine the best possible ventilation for your building. This provides you with the data you need to ensure design accuracy. This means that your resulting ventilation system will be at peak efficiency for your building and its environs. Finally, please contact Moffitt Corporation for more information about our products and services.