A well-designed duct system is a critical part of any building's energy efficiency and indoor air quality.

To accomplish this, the proper duct fittings must be used, such as the 90 degree and 45 degree straight elbow.

In this article, we will learn a little more about these two accessories and their importance in duct systems.

90 degree straight elbow

A 90 degree straight elbow is a commonly used accessory in duct systems, as it allows for an abrupt change of direction in a duct, without significantly affecting airflow efficiency.

In other words, this accessory can make the air flow in a direction perpendicular to the original one. These elbows are especially useful for directing air to wall or ceiling outlets.

45 degree straight elbow

 On the other hand, the 45 degree straight elbow is a similar accessory, but instead of an abrupt change in direction, it allows for a more subtle change, at a 45 degree angle.

This type of elbow is used when smoother turns are required to prevent airflow obstruction and reduce resistance in the system.

Both types of elbows are manufactured in a variety of materials, from galvanized sheet steel to stainless steel.

The material chosen will depend on the intended use, the size of the duct and the available budget. Additionally, it is important to consider the thickness of the material to ensure the durability and integrity of the duct system.

When it comes to installation, it is essential to follow the manufacturer's instructions and comply with local codes and regulations.

The ends of the ducts where the elbows will be installed must be cleaned and a snug fit must be ensured to prevent air leaks and possible problems in the future.

In short, 90 and 45 degree straight elbows are essential accessories in duct systems.

They are used to change the direction of airflow in a variety of applications and are available in different materials and thicknesses.

When installed correctly, these elbows can improve a building's energy efficiency and air quality. Therefore, it is important to choose the proper accessories and follow the installation instructions carefully to achieve maximum performance from the duct system.