12-Outlet Ventilation Manifold and Air Distribution Box

A 12-outlet HRV distribution box is a high-capacity ventilation manifold engineered for extensive HVAC distribution systems requiring multiple connection points. This floor screed ventilation manifold (available with 160mm or 200mm inlets) ensures balanced airflow distribution from the main duct to twelve separate air outlets. The rigid galvanized steel casing provides maximum structural stiffness, allowing safe, concealed installation in floor screeds, behind false ceilings, or inside wall niches without risk of deformation. The unit is available with three types of branch connections: galvanized steel (OC), plastic (PK), or rubber (GM).

Where is it used?

This air distribution box is specifically designed for high-performance heat recovery ventilation (HRV) systems in large residential properties and commercial buildings. Its ultra-flat design (82 mm casing height) allows for seamless integration into areas with limited mounting height, such as suspended ceilings or floor insulation layers, without reducing the effective volume of the room. The manifold is optimized to provide balanced airflow distribution across all twelve channels.

Design Features and Benefits

• Load-resistant steel casing: The heavy-duty galvanized steel construction ensures long-term durability and protects internal air distribution channels against external pressure during concrete pouring or structural mounting.
• Universal compatibility: All twelve outlets are precisely calibrated to securely connect with standard 75 mm semi-rigid flexible ducts used in modern radiant ventilation networks.
• Condensation protection: For systems operating with cold outdoor air or installed in unheated zones, insulated versions (index I) with a built-in mineral wool layer are available to prevent internal condensation and improve acoustic comfort.

Branch Connection Options

The selected material for the branch connections defines the duct fixing method and the overall thermal performance of the connection:

• OC (Galvanized steel): A traditional, high-strength solution. Rigid metal branches ensure the mechanical integrity of the connection. Ducts are typically secured using standard hose clamps or reinforced sealing tape.
• PK (Plastic): Equipped with polymer branches featuring special fixing rings that lock the flexible duct in place, significantly reducing installation time. Plastic components have low thermal conductivity, improving the thermal performance of the connection and preventing cold spots.
• GM (Rubber): Branches feature elastic seals for a friction-based, airtight fit. This design ensures the high airtightness of the ventilation system and contributes to vibration dampening within the air distribution box.

Technical Specifications

Dimensions (L x W x H)

Please note that the overall dimensions vary depending on the chosen branch type and main inlet diameter:

• OC model (Galvanized): 523 x 266 x 82 mm (160 mm or 200 mm inlet)
• PK model (Plastic): 563 x 282 x 82 mm (160 mm or 200 mm inlet)
• GM model (Rubber): 523 x 266 x 82 mm (160 mm or 200 mm inlet)