The Lambro 4 inch x 25 foot UL 181 air connector is ideal for bath fan exhaust and other general venting applications that require moist air and humidity from exiting the home. This duct is made from multiple layers of aluminum / polyester material bonded with a fire retardant adhesive with a maximum operating temperature of 257°F. The duct is supported by a galvanized wire helix spiral frame to prevent collapsing. This duct cannot be installed in lengths greater than 14 feet as per the UL 181 class 1 guidelines and can be cut to length as needed. Check local building codes prior to installation.
- Retail insert
- UL 181 class 1 certified marked and listed duct
- Not to be installed in lengths greater than 14 feet
- Maximum operating temperature of 257°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 (UL 2158A duct must be used)
- Installation clamps (not included)
Product Contains:
(1) – 4 inch x 25 foot UL 181 class 1 air connector
