The Lambro 4-inch x 25-foot UL 181 Class 1 certified and marked non-Insulated air connector utilized in the HVAC sector for supply and return in systems operating at low to medium pressure, as well as for exhaust applications.
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 multiple layers of aluminum/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)