The Lambro FMD-1425 flexible air duct is engineered to provide efficient and reliable air distribution in standard heating, ventilation, and air conditioning setups. Measuring 14 inches in diameter by 25 feet in length, this ducting solution is ideal for connecting main trunks to supply registers, enabling flexible routing around structural obstacles.
Constructed with an integrated insulation layer, this flexible duct minimizes thermal loss or gain while air travels through unconditioned spaces like attics or crawlspaces. The outer aluminized vapor barrier provides essential protection against moisture infiltration and tearing, helping maintain overall system efficiency and reducing condensation risks during high-humidity seasons.
When installing flexible ducting, contractors and DIY installers should ensure proper support and minimal bending to maintain ideal static pressure. This duct is suitable for various residential or light commercial airflow configurations. Careful measurement and compliance with regional mechanical installation guidelines will ensure successful integration into your complete HVAC layout.









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