Description
Product Description
The Lambro 4-inch x 25-foot air connector is a UL 181 Class 1 certified component designed for supply, return, and exhaust applications in low-to-medium pressure HVAC systems. It features a durable construction of aluminum, metalized polyester, and standard polyester layers bonded with a fire-retardant adhesive capable of withstanding temperatures up to 250°F. A galvanized wire helix reinforces the structure, ensuring the duct maintains its shape and resists collapsing under pressure.
Features
- UL 181 class 1 certified marked and listed duct
- Do not install in lengths greater than 14 feet
- Maximum operating temperature of 250°F
- Ideal for bath fan exhaust ventilation applications
- Constructed with a layer of aluminum/polyester and metalized/polyester material
- Galvanized helix wire construction for additional support
- Flexible design for easier installation
- Do not use for clothes dryer installations (use UL 2158A duct)
- Installation clamps (not included)