Air Flow Products 5240805 Ceiling Diffuser Boot 4x8x5

Product Description

The AIR FLOW PRODUCTS 5240805 is a straight ceiling diffuser boot designed to connect ductwork to a ceiling diffuser in residential and light commercial HVAC systems. This boot provides a direct, straight-through airflow path from the supply duct to the diffuser face, with an opening dimension of 4 inches by 8 inches and a depth of 5 inches. HVAC technicians and sheet metal installers use this fitting to terminate supply runs at the ceiling plane, ensuring a clean, flush transition between the duct system and the diffuser grille.

This diffuser boot is suited for new construction and retrofit applications in residential homes and light commercial spaces where a straight ceiling supply register or diffuser is specified. It is installed at the end of a supply air branch run, oriented to discharge air downward through the ceiling. The 4-by-8-inch neck size is a common dimension found in residential supply systems, making this boot a standard fit for many layout configurations.

Key Features

• Straight boot configuration allows direct vertical discharge through the ceiling plane
• 4 inch by 8 inch neck opening mates with standard rectangular supply ductwork
• 5 inch depth provides clearance for installation within typical ceiling joist cavities
• Designed for use with standard ceiling diffusers and rectangular register grilles
• Suitable for new construction and retrofit supply air termination applications

Compatibility

Designed as an OEM-style replacement and new-installation fitting for residential and light commercial supply duct systems terminating at ceiling-mounted diffusers or register grilles with a 4 inch by 8 inch neck opening.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. Shut down the air handling system and de-energize the air handler before connecting or sealing ductwork at this boot. Secure the boot to the duct and ceiling framing using appropriate fasteners, and seal all joints with UL 181-listed mastic or metal-foil tape in accordance with local mechanical codes. Do not operate the system without the diffuser or register grille properly seated and secured to the boot face.

Technical Specifications

• Boot Style: Straight
• Neck Dimensions: 4 inches x 8 inches
• Boot Depth: 5 inches
• Application: Ceiling supply air diffuser termination

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 5240805