Made in the USA NOMMA
36 West Pennsylvania Avenue Walkersville, MD 21793

Custom Fabricated Louvers by Hercules Custom Iron, LLC.

The Main Difference Between Custom Louvers and Dampers

The Main Difference between Custom Louvers and Dampers

Dampers and custom louvers are both used for very similar purposes, such as the management of airflow.

Dampers and custom louvers are both used for very similar purposes, such as the management of airflow. However, people often get the two of them confused due to the few similarities that they have. For example, they both have excellent horizontal blades and exterior frames. They’re also placed on walls and can either work as the supply or exhaust entry point for air ventilation. They are two devices that serve almost the same purposes, but there are also many differences. The biggest difference between the two is that when it comes to building a new ventilation or security system, custom louvers are used to separate things like rain, snow, and intruders from the airflow. Meanwhile, dampers are used for preventing airflow in a single direction. Here are the main differences between custom louvers and dampers.

Custom Louvers and Dampers

As mentioned before, louvers and dampers both can control the airflow in a processes system or enclosed area. Dampers can be located in both motor-driven and gravity-operated editions. The usage of motorized dampers is usually seen in spots where a very tight seal is required or when a damper has to work against airflow. Gravity dampers, or as they are sometimes commonly known as shutters, are needed in horizontal fan exhaust applications. On the other hand, louvers are used in spots where protection from water and debris infiltration is required. When an application needs protection from extreme weather, possible intruders, or general security and privacy, louvers are the better option.

Different Types of Dampers and Custom Louvers

Dampers usually are available in multiple shapes, including square, rectangle, circle, and are made of metal. Some kinds of dampers can be used for pressure relief, and some are even used within HVAC systems, much like louvers. The most common kind of dampers are backdraft dampers, bubble-tight dampers, and round isolation dampers. For louvers, there are also many different kinds, like stationary louvers, adjustable louvers, combination louvers, and industrial louvers. Hercules Custom Louvers specializes in all kinds, shapes, and sizes of louvers – and are typically crafted with aluminum.

The Difference in Blades

The louver is a type of shutter that comes in horizontal slats that are angled to create space for air and light but restrict rain and direct sunlight. Dampers usually control just airflow in one direction. The biggest difference between the two lies in their blades, louver blades are generally consistent and unable to move while dampers can move their blades.

If you have any questions about louvers, give Hercules Custom Louvers a call!


When you are ready for quality louvers, the professionals at Hercules Custom Louvers are ready to help. For more information and to learn how we can meet your custom louver needs, contact Hercules Custom Louvers online or giving us a call at 1-800-331-2590. We will ensure your investment serves your property for years to come! For updates and to see projects we’re working on, visit us on FacebookTwitterTwitterYouTube, and Pinterest.

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Hercules Louvers
36 West Pennsylvania Avenue Walkersville, MD 21793
Phone: 1.800.331.2590