Duct Board Starting Collar — Galvanized Steel

This duct board starting collar creates a round branch connection from duct board, plenums, and compatible flat HVAC surfaces. The top tabs help secure the collar through the prepared opening, while the integral attachment flange provides a stable mounting surface for fastening and sealing the fitting.

Constructed from 26-gauge galvanized steel, the round collar connects to compatible metal duct or properly secured flexible duct. It is suitable for residential and commercial supply-air, return-air, and general ventilation systems.

Available Sizes: 5", 6", 7", 8", 9", 10", 12", 14", 16", 18", and 20".

Sizing Note: Select the collar according to the required nominal round duct diameter. Confirm the duct opening and connection size before ordering.

• 26-gauge galvanized steel construction
• Designed for duct board, plenums, and compatible flat HVAC surfaces
• Top tabs help secure the collar through the prepared opening
• Integral attachment flange supports fastening and sealing
• Round collar connects to compatible metal or flexible duct
• Creates a round HVAC branch connection
• Suitable for supply-air, return-air, and ventilation systems
• Available in 5", 6", 7", 8", 9", 10", 12", 14", 16", 18", and 20" sizes
• Suitable for residential and commercial HVAC installations

• Product Type: Duct Board Starting Collar
• Material: Galvanized Steel
• Material Gauge: 26 Gauge
• Connection Shape: Round
• Mounting Type: Top Tabs with Attachment Flange
• Compatible Surfaces: Duct Board, Plenum, or Compatible Flat HVAC Surface
• Available Diameters: 5", 6", 7", 8", 9", 10", 12", 14", 16", 18", and 20"
• Application: HVAC Branch Duct Connection
• Product Code: DBC

Application: Designed to create a round branch connection from duct board, plenums, and compatible flat HVAC surfaces.

Installation: Mark and cut the properly sized opening. Insert the tabbed end through the opening and bend the top tabs outward to help secure the collar. Fasten and seal the attachment flange as required for the installation.

Connection: Attach compatible round metal duct or properly secured flexible duct to the collar. Mechanically fasten and seal the connection using a method appropriate for the HVAC system.

Size Selection: Choose the option that matches the required nominal round duct diameter. Available sizes include 5", 6", 7", 8", 9", 10", 12", 14", 16", 18", and 20".