Zehnder TVA-P 1x90 expansion box – Zehnder HVAC distribution component

Zehnder TVA-P 1x90 expansion box is a ventilation distribution component designed for HVAC systems where a single 90° branch is required. Intended for integration with compatible Zehnder ducting and ventilation units, this intermediate box helps route and balance airflow in residential and commercial ductwork installations. The TVA-P 1x90 model provides a compact solution for redirecting airflow at a right angle without requiring complex fittings.

Advantages

The expansion box offers a consistent and reliable 90° branch connection that simplifies installation and reduces the number of separate fittings needed. Manufactured to fit Zehnder ventilation systems, it ensures proper alignment and sealing with matching duct components. Its design supports balanced airflow distribution and contributes to quieter operation by minimizing turbulence at the branch point.

Suitable for

• Residential ventilation systems requiring a right-angle branch
• Commercial HVAC installations with Zehnder ducting
• Projects needing a compact intermediate junction to redirect airflow
• Retrofit works where an existing run requires a 90° branch

Key specifications

• Function: single 90° branch ventilation expansion box for duct systems
• Compatibility: designed for use with Zehnder ducting and ventilation units
• Application: indoor HVAC distribution for residential and commercial buildings
• Purpose: routing and balancing airflow at a right-angle junction

How to use

Connect the TVA-P 1x90 expansion box into a prepared run of ducting at the point where a 90° branch is required, ensuring mating surfaces are clean and properly aligned with the corresponding Zehnder ducts or fittings. Secure connections according to installation guidelines for your ventilation system, using appropriate seals or gaskets where specified to prevent air leakage. After installation, check airflow balance and make any necessary adjustments at dampers or balancing devices in the system to achieve the required distribution.

Usage recommendations

Use this component with Zehnder-compatible ducts and observe the manufacturer’s installation instructions. Verify that system sizing and airflow requirements match the intended use of a single 90° branch, and perform sealing and balancing checks after installation to maintain efficient ventilation performance.