Mm Manufacturing 400-14X12 Tapered Reducer 14x12 in

Product Description

The MM Manufacturing 400-14X12 is a tapered reducer fitting used in ductwork systems to transition between two different duct opening sizes. This fitting reduces airflow passage from a larger opening to a smaller one in a gradual, tapered profile, helping to maintain velocity pressure and minimize turbulence at the transition point. At 14 inches by 12 inches, this piece fits mid-range residential and light commercial duct runs. It weighs 1.25 pounds and measures 8 inches in height. HVAC installers and sheet metal contractors are the primary trades who work with this fitting during new construction and system modification projects.

This tapered reducer is suited for forced-air HVAC duct systems where a smooth, gradual size transition is needed between supply trunk lines and branch runouts, or between main duct sections of differing dimensions. The 400 series is available in 42 size combinations ranging from 4 inches by 3 inches up to 24 inches by 22 inches, making it a flexible option across a wide range of duct layout configurations in residential and light commercial applications.

Key Features

• Tapered profile reduces duct size gradually to minimize airflow turbulence at transitions
• 14 inches by 12 inches opening size suits mid-range supply trunk and branch duct runs
• 8-inch height provides a gradual taper angle for smooth velocity transition
• Lightweight at 1.25 pounds for easier handling during overhead or confined-space installs
• Part of the 400 series with 42 available size combinations for broad system compatibility

Compatibility

Designed as an OEM-style duct fitting for forced-air HVAC ductwork systems requiring a tapered transition between two rectangular duct openings.

Installation Notes

Installation of duct fittings should be performed by a qualified HVAC technician or licensed sheet metal contractor in accordance with applicable mechanical codes. Shut down the air handling unit and disconnect power before modifying any duct section. Seal all joints with approved duct sealant or mastic and secure with sheet metal screws to meet SMACNA and local energy code requirements. Do not install in systems with airflow conditions outside the rated duct dimensions of this fitting.

Technical Specifications

• Length: 14 inches
• Width: 14 inches
• Height: 8 inches
• Weight: 1.25 pounds

Standard Information

• Brand: MM Manufacturing
• Manufacturer Part Number: 400-14X12