Seal-tite 1278-24-041207 Register Boot 4x12x7 in 24 in Rails

Product Description

The SEAL-TITE 1278-24-041207 is a straight register boot designed for basement and ceiling duct termination in residential and light commercial HVAC systems. This boot connects rectangular ductwork to a floor, ceiling, or sidewall register opening, providing a clean transition from the supply trunk or branch run to the grille or register face. The unit measures 4 inches by 12 inches at the collar with a 7-inch depth and is equipped with 24-inch mounting rails for secure attachment during rough-in or retrofit installations. HVAC installers and sheet metal mechanics are the primary trades working with this component.

This register boot is suited for new construction and retrofit projects where the supply air outlet is routed through a basement ceiling or finished ceiling assembly. The 24-inch rail length accommodates standard joist spacing and allows the boot to be fastened directly to framing members before drywall or subfloor installation. The straight configuration eliminates offsets, making it a straightforward fit for vertical or horizontal duct runs terminating at the register opening.

Key Features

• Straight boot configuration for direct duct-to-register transitions without offsets
• 4 x 12 inch collar opening matches standard residential register and grille sizes
• 7-inch boot depth provides clearance for framing and insulation layers
• 24-inch mounting rails allow attachment to standard joist bays
• Designed for basement ceiling and overhead ceiling register applications

Compatibility

Designed as an OEM-style replacement or new-installation component compatible with 4 x 12 inch rectangular supply registers and grilles in residential forced-air HVAC duct systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal mechanics as part of a forced-air distribution system. Power down the air handler or furnace at the disconnect before making final duct connections. Secure the mounting rails to framing members using appropriate fasteners, and seal all duct joints with listed duct sealant or metal tape per local mechanical codes. Do not leave duct joints unsealed, as air leakage reduces system efficiency and may cause pressure imbalance.

Technical Specifications

• Collar Opening: 4 x 12 inches
• Boot Depth: 7 inches
• Rail Length: 24 inches
• Boot Type: Straight
• Application: Basement and Ceiling Register

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 1278-24-041207