7" x 5" Smoke Pipe Duct Increaser/Reducer, Tapered, 26GA

Lukjan 7" x 5" Smoke Pipe Duct Increaser/Reducer – Professional HVAC Transition Fitting

The Lukjan 7" x 5" Smoke Pipe Duct Increaser/Reducer is engineered to provide a precise and durable transition between duct sizes. Built from galvanized steel with protective coating, it ensures efficient airflow management and long service life in both residential and commercial HVAC installations.

Performance Features

• Heavy-Duty Construction: Fabricated from galvanized steel with G-30 lock-forming quality per ASTM-A653 CS type B.
• Reliable Transition: Designed to reduce turbulence when stepping between 7" and 5" ducts, maintaining system efficiency.
• Consistent Fit: Machine-produced dimensions and tapered form guarantee uniform sizing and reliable installation.
• Corrosion Protection: G-30 coating enhances durability and extends service life under demanding site conditions.
• Application Versatility: Suitable for residential furnace connections, light commercial systems, and retrofit work.

Technical Specifications

• Material: Galvanized steel with G-30 coating
• Nominal Sizes: 7" x 5"
• Length: 5 inches
• Style: Non-crimped tapered design
• Standard: ASTM-A653 CS Type B compliance

Installation Notes

This reducer is straightforward to install but requires proper fastening and sealing to prevent air leakage. For compliance with building and mechanical codes, installation should be handled by a licensed HVAC professional. Where field installation is performed, correct measurement and alignment are critical to achieving an airtight connection.

Contractor Guidance

For Professionals: The 7" x 5" increaser/reducer saves time on-site thanks to consistent sizing and a robust build that handles daily use. It’s designed to integrate into duct systems without additional fabrication.

For Skilled Installers: Although manageable with basic HVAC tools, attention to accurate placement and sealing is essential to maintain efficiency. Always verify local code requirements before final assembly.

Reliable Transition Component

The Lukjan 7" x 5" Smoke Pipe Duct Increaser/Reducer is a dependable solution for airflow transitions, delivering strength, consistency, and compliance for professional-grade installations.