
100 mm Round Ceiling Diffuser
Elegant round ceiling diffuser with adjustable airflow
This round steel diffuser ensures reliable and quiet air distribution in your premises. The glossy finish and modern design allow it to blend seamlessly into any interior, while convenient ceiling installation is suitable for both air supply and exhaust.
Convenient airflow adjustment
The convenient central disc rotation mechanism allows for easy and precise adjustment of the desired air volume.
Glossy and practical surface
High-quality epoxy paint coating (RAL 9010) provides a glossy finish and prevents dirt accumulation.
Simple installation
The included mounting ring ensures quick and secure installation of the diffuser in the ceiling.
Why choose this round diffuser?
Indoor microclimate depends directly on proper air distribution. This round diffuser ensures quiet, even, and draft-free air distribution. Made from sturdy sheet steel, it guarantees durability and reliability, while the rotating central disc allows you to perfectly balance the ventilation system according to your needs.
Design and interior compatibility
When designing a home or office interior, we often look for details that are both functional and aesthetic. The classic round design easily matches various ceiling styles. The white (RAL 9010) glossy surface not only looks beautiful but also repels dirt, making it perfect for living rooms, bedrooms, or modern offices.
Complete ventilation system
Efficient ventilation requires carefully matched components. This model is specially designed for systems with low pressure drops and pairs perfectly with flexible or rigid ducts and heat recovery units. ORO Haus specialists are always ready to help you choose the best solutions for your perfect home climate.
Key specifications
Below is the most important technical data to help you ensure this diffuser is suitable for your interior and ventilation system.
| Parameter | 100 mmSelected | 125 mm |
|---|---|---|
| Material | Sheet steel | Sheet steel |
| Mounting type | Ceiling, with mounting ring | Ceiling, with mounting ring |
| Air direction | Supply / Extract (Bidirectional) | Supply / Extract (Bidirectional) |
| Adjustable flow | Yes (by rotating central disc) | Yes (by rotating central disc) |
| Duct diameter | 100 mm | 125 mm |
Dimensions
The device features compact dimensions and optimal depth, allowing for easy integration into the ceiling.
| Parameter | 100 mmSelected | 125 mm |
|---|---|---|
| Outer diameter (ØC) | 140 mm | 173 mm |
| Connection diameter (ØB) | 98 mm | 123 mm |
| Total depth (L1) | 50 mm | 50 mm |
| Weight | 323 g | 460 g |
Airflow data
Proper airflow selection guarantees comfort and reduces noise levels in the room.
| Parameter | 100 mmSelected | 125 mm |
|---|---|---|
| Max. airflow | Up to 360 m3/h | Up to 720 m3/h |
The installation of this model is quick and convenient thanks to the included mounting ring. It is adapted for stable ceiling installation. The full manufacturer's manual can always be found in the specifications section.
Mounting preparation
Cut a hole of the appropriate diameter (100 mm or 125 mm) in the ceiling. Make sure there is enough flat area around the hole for the mounting ring and the outer diffuser plate to fit snugly.
Duct connection
Connect the ventilation system duct to the mounting ring spigot. To prevent vibrations, the use of flexible connectors is recommended. Ensure system tightness.
Diffuser installation
Once the mounting ring is attached to the ceiling, simply insert the diffuser itself into the ring. The design allows the device to lock firmly in place.
Airflow adjustment
Airflow is very easily adjusted by rotating the central disc, widening or closing the air passage gap. This allows for achieving the perfect balance in the system.
Cleaning and maintenance
The glossy epoxy paint coating effectively repels dirt. If necessary, simply wipe the visible plate with a soft, damp cloth, avoiding harsh chemical cleaners.

Complete your ventilation system
Combine this device with our flexible ducts, silencers, and heat recovery units. By choosing everything from one source, you will ensure full system compatibility and maximum performance.
Frequently Asked Questions
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