Air Flow Products 86F18 Full Flow Tee 18x18x18

Product Description

The Air Flow Products 86F18 is a full flow tee fitting designed for duct distribution systems in commercial and residential HVAC applications. This tee maintains consistent airflow through all three openings by eliminating the flow restrictions common in standard tee fittings. With all three openings sized at 18 inches, it is suited for main trunk-line branch connections where balanced air delivery is required. HVAC sheet metal mechanics and ductwork installers handle this fitting as part of new construction or system retrofit projects.

The 86F18 is used where a trunk duct must split or branch without significant pressure drop at the junction. The full flow design supports applications in larger air-handling systems where maintaining static pressure balance across branches is critical. It fits trunk-to-branch connections in both supply and return duct configurations in commercial light construction and residential replacement work.

Key Features

• Full flow design minimizes pressure drop at the tee junction
• All three openings are 18 inches for a balanced, symmetrical connection
• Suited for trunk-line branch connections in supply and return duct systems
• Supports balanced air delivery across distribution branches

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 18-inch round or rectangular duct systems in commercial and residential HVAC ductwork.

Installation Notes

Installation is typically performed by licensed sheet metal mechanics or HVAC technicians. Shut down the air-handling unit and verify the system is de-energized before making duct connections. Secure all joints with approved fasteners and seal with UL-listed duct tape or mastic sealant per local mechanical code requirements. Follow applicable SMACNA guidelines for duct joint assembly and support spacing.

Technical Specifications

• Opening Size (All Three): 18 x 18 x 18 inches
• Fitting Type: Full Flow Tee

Standard Information

• Brand: Air Flow Products
• Manufacturer Part Number: 86F18