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Lambro FID-625 6-Inch x 25-Foot Insulated Silver Core Flexible Duct

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The Lambro FID-625 is a 6-inch by 25-foot insulated flexible air duct featuring a silver core, engineered to provide thermal management and smooth airflow routing within residential and commercial ventilation networks.

SKU: AHV-DUCT-50596
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Product information

This high-performance insulated flexible air duct is optimized for versatile application in both supply and return ventilation paths. Manufactured with an internal silver core and surrounded by dependable fiberglass insulation, it maintains air temperatures throughout the run while dampening mechanical vibration and minimizing thermal transfer between conditioned and unconditioned spaces.

HVAC professionals frequently select this FID series model when looking for resilient ducting components that can navigate complex ceiling bends and tight attic environments without kinking. Its integrated steel wire helix provides excellent shape retention, ensuring that airflow remains entirely unobstructed and system static pressure stays within specified design parameters.

Before finalizing your purchase, verify that the 6-inch diameter and 25-foot length match your project dimensions and structural layout. For maximum thermal and aerodynamic performance, it is recommended to fully extend the flexible ducting during setup, avoiding sharp bends, and sealing all connections with high-grade tension straps or specialty tape.

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