Air Branch Fittings

Air Branch Fittings – Y-Branch, T-Branch (BTO) & Double Branch Take-Off (DBTO)

Split and redirect conditioned airflow with confidence using our Air Branch Fittings. Designed for ducted HVAC systems, these branch connectors let you divide a single duct run into multiple outlets — giving you flexible, efficient air distribution across multiple zones or rooms.

Available Configurations

• Y-Branch Connector – Splits airflow symmetrically into two equal outlets at an angle. Ideal for balanced dual-zone distribution from a single trunk duct.
• T-Branch Take-Off (BTO) – Tees off a branch from the main duct run. Perfect for adding a lateral outlet without interrupting the primary airflow path.
• Double Branch Take-Off (DBTO) – Creates two lateral branches from a single trunk. Ideal for compact ceiling spaces where multiple outlets are needed close together.

Understanding the Size Codes

Sizes are listed as main trunk – branch 1 – branch 2 (in inches). For example:

• Y 12-10-10 – 12" trunk splits into two 10" branches
• BTO 14-14-10 – 14" trunk with a 14" continuation and 10" branch take-off
• DBTO 12-10-10-10 – 12" trunk with three 10" branch outlets

Key Features

• Durable construction – Yellow polymer body with galvanised steel collars for long-lasting performance in ceiling and wall cavities
• Airtight connections – Crimped steel collar ends ensure a secure, leak-free fit with standard flexible duct
• Optimised airflow – Smooth internal geometry minimises turbulence and pressure drop for efficient air delivery
• Easy installation – Lightweight design speeds up installation in tight roof spaces and wall cavities
• Broad compatibility – Suits standard round flexible duct used in residential and light commercial ducted AC systems

Select the branch type and size that matches your duct diameter. Not sure which fitting suits your layout? Contact us and we’ll help you choose the right one.