Air distribution box gbc AIR DISTRIBUTION BOXSLIM DN125-2X75, DN125 inlet to 2×DN75 outlets

GBC AIR DISTRIBUTION BOXSLIM DN125-2X75 is a compact air distribution box designed to split an incoming DN125 duct into two DN75 outlets. Intended for use in ventilation systems, the unit provides a straightforward method to branch a main supply or extract duct into two smaller runs while preserving airflow characteristics. Its slim profile and simple geometry make it suitable for installations in limited spaces and for retrofit projects where space and accessibility are constrained.

Advantages

The distribution box offers a compact footprint and straightforward connection points that simplify duct routing and reduce installation time. Made to work with standard round ducts, it ensures consistent airflow division between two DN75 outlets and helps maintain system balance when used with appropriate ducting and diffusers. The slim design supports installation in shallow ceiling voids or narrow service spaces without requiring complex modifications.

Suitable for

• Branching a main DN125 ventilation duct into two DN75 supply or extract ducts
• Residential ventilation systems and small commercial HVAC applications
• Retrofit installations where a compact distribution solution is needed
• Routing ducts in limited-depth ceiling voids or narrow service spaces

Key specifications

• Inlet diameter: DN125
• Outlet diameters: 2 × DN75
• Form factor: slim, round-to-dual-round distribution unit
• Intended application: air distribution for ventilation systems
• Compatibility: standard round ducts of corresponding diameters

How to use

Install the distribution box inline with the main DN125 duct so the inlet receives the primary airflow. Connect two DN75 ducts to the outlet sockets, ensuring secure mechanical joins and appropriate sealing to prevent leakage. Position the unit so that it remains accessible for inspection and, if necessary, cleaning. Integrate with existing ductwork and diffusers according to the ventilation design to maintain desired airflow and balance across branches.

Usage recommendations

Verify airflow requirements and balance when splitting a main duct; use dampers, balancing devices or airflow measurement tools downstream if precise airflow distribution is required. Ensure all connections are sealed and supported to avoid sagging or air leaks. Confirm material compatibility with the surrounding HVAC components and allow sufficient clearance for installation and future access.