10" x 8" Smoke Pipe Duct Increaser/Reducer, Tapered, 26GA

Lukjan 10" x 8" Galvanized Smoke Pipe Duct Increaser/Reducer

The Lukjan 10" x 8" increaser/reducer is a precision-formed galvanized steel fitting used to transition between unequal duct diameters in HVAC systems. Manufactured to industry specifications, it supports efficient airflow while maintaining structural integrity under normal operating pressures and temperatures.

Application

This fitting is suitable for supply and return air duct systems in residential, commercial, and light industrial HVAC installations. It ensures proper air balance and smooth transitions between 10" and 8" duct sections, minimizing turbulence and static pressure losses in forced-air systems.

Performance Characteristics

• Material: 26-gauge galvanized sheet steel with G-30 protective coating
• Nominal Sizes: 10" x 8"
• Length: 5 inches
• Fabrication Standard: Lock forming quality per ASTM-A653 CS Type B
• Connection: Straight ends designed for standard sheet metal joint assembly

Installation Guidelines

Install according to SMACNA duct construction standards using mechanical fasteners and approved sealants or tapes to ensure airtight joints. Proper support spacing must be maintained per code requirements to prevent sagging or deformation. Verify alignment before fastening to reduce stress at connection points and maintain consistent system airflow.

Advantages

• Code-Compliant: Meets ASTM-A653 specifications for galvanized steel duct fittings.
• Durable Construction: Galvanized steel resists corrosion and mechanical wear in service conditions.
• Efficient Airflow: Transition design minimizes turbulence at duct size changes.
• Professional Grade: Engineered for long-term use in HVAC system installations and retrofits.

The Lukjan 10" x 8" smoke pipe duct increaser/reducer provides contractors with a reliable, precision-made transition fitting. Its heavy-duty galvanized steel construction, code-compliant fabrication, and accurate sizing ensure consistent performance across a wide range of HVAC projects.