4-Inch Starter Box for Selkirk Model HT Chimney

The 4-inch starter box is a galvanized ceiling-support component for the Selkirk Model HT chimney system. Selkirk identifies this part as HT4SB. It can be used in place of the black ceiling support in compatible installations and is commonly selected where a square support box fits the desired ceiling layout.

Selkirk literature identifies the 4-inch starter box as a commercial-style support component with galvanized construction and approximately 12 inches of height.

4-Inch Starter Box Features

• Chimney size: 4 inches
• Manufacturer: Selkirk
• Selkirk product code: HT4SB
• Construction: Galvanized steel
• Height: approximately 12 inches
• Width: approximately 10 inches
• Application: Ceiling support for compatible 4-inch Model HT chimney installations

Starter Box vs. Black Ceiling Support

The starter box and 4-Inch Black Ceiling Support serve similar ceiling-support roles but provide different finished appearances and installation formats. Choose the component that matches the structure and the Selkirk installation instructions for the planned chimney route.

The starter box should not be selected only for appearance. Framing, ceiling type, chimney load, support requirements, and clearances all affect the correct component.

Related 4-Inch Chimney Components

• 4-Inch HT Pipe Adapter
• 4-Inch Insulated Chimney Pipe - 36-Inch Length
• 4-Inch Insulated Chimney Pipe - 24-Inch Length
• 4-Inch Attic Insulation Shield
• 4-Inch Rain Cap

Read our 4-Inch Stove Pipe Guide or browse all 4-inch chimney and installation accessories.

Installation Notes

Use the starter box only in a configuration shown in the Selkirk installation instructions. Do not cut, shorten, or modify the support box unless the manufacturer instructions explicitly permit it.

Follow the appliance manual, Selkirk instructions, and applicable building and fire codes for framing, chimney support, clearances, attic protection, roof penetration, and total chimney height.

For current manufacturer documents, see the Selkirk Ultra-Temp resource page.