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The Air Flow Products RE1412 is a round duct reducer-increaser fitting designed to transition between 14-inch and 12-inch duct diameters in forced-air HVAC systems. This type of fitting is used to step duct size up or down at branch connections, air handler outlets, or wherever duct sizing changes are required along a run. It maintains airflow continuity while accommodating the size change, reducing turbulence at the transition point. Licensed HVAC technicians and sheet metal contractors install this fitting during new construction and retrofit duct work.
The RE1412 is suited for residential and light commercial forced-air duct systems where a 14-inch to 12-inch transition is required. Typical applications include main trunk reductions, branch takeoff transitions, and connections between differently sized duct sections. It fits into standard round duct assemblies and is compatible with common slip, drive, and sheet metal screw connections used throughout the industry.
Designed as an OEM-style replacement or new-installation fitting for standard 14-inch to 12-inch round duct systems in residential and light commercial HVAC applications.
Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with applicable mechanical codes. Power down the air handling equipment before working on the duct system. Secure the fitting with sheet metal screws and seal all joints with approved duct sealant or UL 181-rated tape to prevent air leakage. Verify duct sizing against the system design before installation to ensure proper airflow delivery.
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