Two-outlet expansion tank 2x75/125 (rectangular) SK2X75/125

Expansion box – a key element of efficient ventilation

The twin-branch expansion box 2x75/125 is an indispensable component in mechanical ventilation systems, both in new buildings and during the modernization of existing installations. It serves to precisely distribute air from the main duct to several smaller ones, ensuring even flow and user comfort. It is particularly important in heat recovery systems, where optimizing airflow translates to efficient heat recovery and energy savings.

Construction and application

Made of galvanized sheet metal with a thickness of 0.6 mm (depending on the manufacturer, it may also be 0.5 mm), the box is characterized by high durability and corrosion resistance. Its construction allows connection of two ducts with a diameter of 75 mm to a branch with a diameter of 125 mm. This makes it possible to effectively distribute air to several rooms from a single point. Inside the box there is a specially designed air guide that minimizes flow resistance and ensures quiet operation of the system.

The expansion box finds wide application in:

• Mechanical ventilation systems: in single-family homes, apartments, offices and other buildings.
• Heat recovery: as a distribution element in heat recovery systems.
• Supply and exhaust installations: ensuring even flow of both supply and exhaust air.
• Hidden mounting: the possibility of installation in concrete screeds, ceilings or under plasters allows for aesthetic integration of the box into the interior design.

Advantages and benefits for the installer and user

• Quick and easy installation: thanks to precise workmanship and standard dimensions, the expansion box enables efficient installation without the need for complicated adaptation work.
• High tightness: factory-installed gaskets (in the case of stainless steel models) guarantee the tightness of connections, minimizing air losses and ensuring optimal system performance.
• Durability and resistance: galvanized sheet metal provides protection against corrosion, which translates to a long service life of the box even in difficult operating conditions.
• Compatibility: the box is compatible with most ventilation units available on the market and with various types of ventilation ducts (e.g. PE-FLEX).
• Customization options: some manufacturers offer boxes made to individual order, allowing them to be adapted to the specific needs of a given project.
• Aesthetics: the possibility of hiding the box in the building structure improves the aesthetics of the interior.
• Energy efficiency: properly distributed air translates to better performance of the heat recovery system and lower heating/cooling costs.

Let's remember – a well-designed ventilation system is an investment in the health and comfort of residents!