12" x 8" x 5' Trunk Duct

Lukjan Rectangular Duct – Series 100 with Loose Cleat Connection

The Lukjan Series 100 rectangular duct is fabricated from lock-forming quality galvanized sheet steel and features a loose cleat connection system for field assembly. This contractor-grade component is designed for use in HVAC supply and return air systems, ensuring durability, code compliance, and consistent airflow performance.

Application

Intended for residential, commercial, and light industrial HVAC installations, this duct section serves as a main trunk or branch line in rectangular air distribution systems. The loose cleat configuration allows quick connection of duct runs in accordance with SMACNA standards.

Performance Characteristics

• Material: 26 ga galvanized sheet steel, G-30 coating
• Fabrication: Series 100, rectangular duct section
• Connection: Loose cleat connection system for slip joint assembly
• Standards: Conforms to ASTM-A653 CS Type B requirements
• Compliance: Fabricated in accordance with SMACNA HVAC Duct Construction Standards

Installation Guidelines

Install ductwork per SMACNA requirements. Seal all longitudinal seams and transverse joints with UL-listed mastic or tape to ensure airtightness and compliance with energy codes. Provide mechanical supports at intervals specified by local code to prevent sagging or misalignment.

Advantages

• Durable Construction: Galvanized steel resists corrosion and maintains structural integrity.
• Efficient Assembly: Loose cleat design simplifies field installation and reduces labor time.
• Professional Grade: Suitable for engineered HVAC systems in both residential and commercial applications.
• Code-Compliant: Meets ASTM and SMACNA fabrication requirements for duct systems.

The Lukjan Series 100 rectangular duct with loose cleat connections offers HVAC contractors a reliable, heavy-duty solution for air distribution systems. Its standardized fabrication and corrosion-resistant galvanized finish ensure long-term performance and compliance with project specifications.