The Imperial 28 gauge galvanised 8″ x 18″ x 60″ half stack duct is used in the installation of central heating systems.
- Use as main trunk line for distribution of supply and return air to branch lines throughout a forced-air system
- 2 “L” sections snap together to form 1 rectangular duct section
- Use drive and “S” cleats to join 2 sections of rectangular duct together
- Galvanized steel construction







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