When is it better to use an elbow instead of just bending the duct?

It is recommended to use an elbow when the installation space is very tight (for example, in narrow gaps between ceilings), and directly bending the flexible duct would deform it. The elbow maintains a solid cross-section and prevents a decrease in airflow.

Are the materials of the 75 mm and 90 mm elbows different?

Yes, the 75 mm elbow of this model is made of metal, while the 90 mm variant is made of plastic. Despite the material difference, both options meet strict ventilation system requirements and ensure durability and airtightness.

Is it necessary to use gaskets when connecting elbows?

Yes, to ensure top-class hermeticity and prevent whistling or pressure drops in the system, it is mandatory to use rubber sealing gaskets on both ends of the duct.

1/6

75 mm Plastic Elbow for Flexible Duct Systems

90° elbow for flexible duct systems

This 90-degree elbow allows you to smoothly and reliably change the direction of a flexible duct in tight spaces. Manufactured from metal or plastic depending on the dimensions, it ensures optimal airflow without significant pressure losses and guarantees system airtightness.

€11.65

In stock·Delivery: 1-3 days

Diameter

90 mm 75 mm

Free shipping over €100

Phone consultation

Secure checkout

Why use special elbows?

Although flexible ducts can be bent naturally, bending them too sharply in confined spaces can deform the duct walls and severely restrict airflow. These 90-degree elbows (the 75 mm model is made of metal, the 90 mm of durable plastic) allow for sharp directional changes safely, without losing ventilation system efficiency.

Airtightness and aerodynamics

The internal geometry of the elbow is designed to minimize air resistance and prevent additional noise generation in the duct run. To ensure the connection is completely hermetic and the system does not lose pressure, it is mandatory to use rubber sealing gaskets of the appropriate diameter during installation.

Compatibility with ventilation components

The fitting is perfectly adapted for standard 75 mm and 90 mm flexible ventilation ducts. In the ORO Haus range, you will find all the necessary sealing gaskets, fixators, and other connection elements for quick and professional installation.

Technical specifications

Key specifications indicating the properties of the fitting according to the selected duct size.

Key specifications
Parameter	Value
Material	Metal (75 mm) / Plastic (90 mm)
Angle	90 degrees
Purpose	Changing duct direction
Suitable diameter	75 mm / 90 mm
Compatible gaskets	Yes (recommended)

Size compatibility

The elbows are adapted to the most popular flexible duct dimensions.

Dimensions
Parameter	75 mmSelected	90 mm
Corresponding duct diameter (D)	75 mm	90 mm

Installing elbows is fast, but to prevent pressure loss, proper sealing must be ensured.

Preparation

Before making the connection, ensure the flexible duct is cut straight across the corrugation groove and is free of sharp burrs.

Sealing

Slip rubber sealing gaskets onto both ends of the ducts you will connect to the elbow (place them into the first or second groove of the duct).

Connection

Firmly push the ducts with the gaskets into the elbow ports from both sides until they stop. If necessary, use additional locking clips for maximum security.