Manual Damper 8" 10" 12" 14" | HVAC Airflow Control Dampers - Air Junction

Manual Damper – 8", 10", 12" & 14" | HVAC Airflow Control

Take precise control of airflow in your ducted HVAC system with Air Junction's Manual Dampers. Available in four standard duct diameters, these dampers allow you to manually regulate or shut off airflow to individual zones or rooms — improving comfort, reducing energy waste, and balancing air distribution across your system.

Built for durability and ease of use, they’re a go-to choice for HVAC installers, tradespeople, and DIY homeowners looking to optimise their ducted air conditioning system.

Key Features

• Manual airflow control — simple lever or handle adjustment to open, close, or partially restrict airflow
• Four size options — 8" (200mm), 10" (250mm), 12" (300mm), and 14" (350mm) to suit standard round duct sizes
• Durable construction — built to withstand long-term use in ceiling cavities and duct runs
• Easy installation — inline fitting for standard flexible and rigid round ductwork
• Zone balancing — ideal for balancing airflow between rooms or isolating unused zones
• Australian stock — fast dispatch from our Sydney warehouse

Available Sizes

• 8" (200mm) — suits smaller branch duct runs and single room outlets
• 10" (250mm) — common size for residential zone control
• 12" (300mm) — suits medium to large duct branches
• 14" (350mm) — ideal for main trunk lines and high-volume zones

Typical Applications

• Zone control in residential ducted air conditioning systems
• Airflow balancing between rooms and floors
• Isolating unused rooms to improve system efficiency
• Retrofit installations in existing duct runs

Select the size that matches your duct diameter. Not sure which size you need? Contact us and we’ll help you choose the right damper for your system.