Air Flow Products 59044084 Short Top Insulated Boot 4x8

Product Description

The AIR FLOW PRODUCTS 59044084 is a short top insulated boot with flange, designed for residential HVAC duct distribution systems. This fitting connects supply ductwork to floor or ceiling registers, providing a thermally insulated transition point that reduces heat loss and condensation at the boot. The 59044084 features a 4x8 inch rectangular body with a 4 inch round collar, making it a compact solution for tight spaces where full-depth boots will not fit. HVAC installers and sheet metal contractors use this type of fitting during new construction and retrofit duct work.

This insulated boot is suited for residential and light commercial forced-air heating and cooling systems. The short top configuration is commonly used in floor installations where joist depth or subfloor clearance is limited, as well as ceiling or sidewall applications where duct height is restricted. The integrated flange provides a secure mounting surface for standard register grilles and allows for a clean, finished appearance at the register face. The 4 inch collar accepts standard flexible duct or rigid round duct connections commonly found in residential supply runs.

Key Features

• Short top design fits in restricted-depth joist bays and framed cavities
• Built-in insulation reduces heat transfer and limits condensation on the boot exterior
• Integrated flange provides a solid mounting surface for register grilles
• 4x8 inch rectangular opening fits standard 4x8 floor and ceiling registers
• 4 inch round collar accepts common flexible and rigid round supply duct

Compatibility

Designed as an OEM-style replacement or new-install fitting for residential forced-air duct systems using standard 4x8 inch floor or ceiling registers with a 4 inch round supply connection.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal contractors. Shut down the air handling system and relieve any system pressure before cutting into existing ductwork. Secure the boot flange to the subfloor or framing using appropriate fasteners, and seal all duct connections with listed mastic or foil tape per local mechanical code requirements. Insulated boots should be installed with insulation intact and undamaged to maintain rated thermal performance.

Technical Specifications

• Boot Size: 4x8 inches
• Collar Diameter: 4 inches
• Configuration: Short Top with Flange
• Insulation: Yes

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 59044084