Lukjan rb304105 Angle Boot 4x10x5 Hvac Duct Fitting

Product Description

The LUKJAN rb304105 is a 4-inch by 10-inch angle boot designed for residential and light commercial HVAC duct systems. This fitting transitions from a 5-inch round duct opening to a 4-inch by 10-inch rectangular register face, directing conditioned air at an angle into the occupied space. Angle boots are standard components in forced-air supply systems, allowing duct runs to terminate at floor, wall, or ceiling register locations. HVAC technicians and sheet metal installers use these fittings when laying out supply air distribution networks.

This fitting is suited for supply air applications in residential forced-air heating and cooling systems. It connects a 5-inch round branch duct to a standard 4-inch by 10-inch register or grille. The angled geometry makes it appropriate for installations where the duct approaches the register from the side rather than straight on, a common configuration in floor and sidewall register layouts.

Key Features

• 4-inch by 10-inch rectangular register face matches standard register and grille sizing
• 5-inch round opening connects directly to standard 5-inch round branch duct
• Angle boot geometry supports sidewall and floor register installations
• OEM-style construction for straightforward drop-in replacement or new-construction use

Compatibility

Designed as an OEM-style replacement or new-construction fitting for forced-air HVAC duct systems using 5-inch round branch ducts terminating at 4-inch by 10-inch registers or grilles.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. Shut down the air handler and secure the system before making duct connections. Seal all joints with mastic or UL 181-rated foil tape per applicable mechanical codes. Verify register and duct sizing against the system design before cutting or connecting branch runs.

Technical Specifications

• Register Height: 4 inches
• Register Width: 10 inches
• Round Opening: 5 inches
• Fitting Type: Angle Boot

Standard Information

• Brand: LUKJAN
• Manufacturer Part Number: rb304105