Air Flow Products 850-1-000000-000807 Reducer Increaser 8x7

Product Description

The AIR FLOW PRODUCTS 850-1-000000-000807 is a duct reducer/increaser designed to transition between two different duct sizes within a forced-air HVAC system. This fitting allows an airstream to step down or step up between an 8-inch and a 7-inch duct section, maintaining directional airflow with a controlled cross-section change. HVAC installers and sheet metal contractors use fittings like this when connecting trunk lines to branch runs or when adapting equipment connections to existing ductwork. The listed size is 8 x 7, and the unit is sold individually.

This reducer/increaser is suited for residential and light commercial forced-air duct systems where a transition between an 8-inch and a 7-inch round or rectangular duct section is required. Typical applications include connecting supply or return air branches, adapting air handler or furnace collars to existing duct runs, and correcting duct-size mismatches during retrofits or new installations. Verify the listed size and part number against your existing duct dimensions before ordering.

Key Features

• Transitions between 8-inch and 7-inch duct sections in a single fitting
• Reducer/increaser configuration supports both step-down and step-up airflow direction
• Sold as a single unit for straightforward one-piece replacement or new installation
• OEM part number 850-1-000000-000807 for precise ordering accuracy

Compatibility

Designed as an OEM-style duct transition fitting for forced-air HVAC systems requiring an 8-inch to 7-inch duct size change. Confirm duct diameter and profile against the listed 8 x 7 size before installation.

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 such as SMACNA standards and local building codes. Power down the air handling unit at the disconnect before working on any connected ductwork. Secure the fitting with appropriate sheet metal screws and seal all joints with listed duct mastic or UL 181-rated tape to prevent air leakage. Do not force-fit the reducer into mismatched duct profiles.