Seal-tite 1370-040806 Straight Boot 4x8x6 Inch

Product Description

The SEAL-TITE 1370-040806 is a straight duct boot fitting designed to transition airflow from round ductwork to a rectangular register or grille opening. This boot measures 4 inches by 8 inches at the face opening and 6 inches at the collar, with a 2-inch extension that provides additional depth for flush or recessed floor and ceiling register installations. HVAC installers and sheet metal technicians use this fitting in residential forced-air supply and return systems where a clean, tight connection between the duct run and the register face is required.

This straight boot is suited for residential HVAC applications where supply or return air registers are mounted in floors, ceilings, or low sidewall locations. The straight profile makes it appropriate for situations where the duct approaches the register from directly below or above. The 2-inch extension allows the boot to seat properly in framing cavities with added depth, reducing the need for field fabrication or additional filler collars.

Key Features

• 4 inch by 8 inch face opening sized for standard rectangular register and grille applications
• 6-inch collar diameter for connection to round supply or return ductwork
• 2-inch extension provides added depth for recessed or framed-in register installations
• Straight boot profile for direct vertical or horizontal duct-to-register transitions
• OEM-style construction for consistent fitment in residential forced-air systems

Compatibility

Designed as an OEM-style replacement and new-installation fitting for residential forced-air HVAC systems using standard 4 inch by 8 inch rectangular registers and 6-inch round duct collars.

Installation Notes

Installation is typically performed by licensed HVAC technicians or qualified sheet metal mechanics. Power down the air handling unit and close the system dampers before fitting or sealing the boot. Secure the collar connection to the round duct with sheet metal screws and seal all joints with UL-listed duct sealant or metal foil tape in accordance with local mechanical codes. Do not use standard cloth-backed duct tape as the primary sealant.

Technical Specifications

• Face Opening: 4 inches x 8 inches
• Collar Size: 6 inches
• Extension Length: 2 inches
• Boot Type: Straight

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 1370-040806