Lambro Industries 181 Class 1 Air Connector for Bath Fan Exhaust – 5 Layer

Bath Fan Duct

The Lambro 4-inch x 25-foot UL 181 Class 1 air connector ideally serves bath fan exhaust and any other general venting applications that require the expulsion of moist air and humidity from the home.

The manufacturer process constructs this bath fan duct from multiple layers of aluminum/polyester material bound together with a fire retardant adhesive that can withstand a maximum operating temperature of 257°F. A galvanized wire helix supports the duct, preventing it from collapsing.

Per the UL 181 Class 1 guidelines, you should refrain from installing this duct in lengths exceeding 14 feet. However, you can cut it to the required size.

Make sure to check local building codes before installation.

Product features and benefits:

• UL 181 class 1 certified marked and listed duct
• Do not install 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 (use UL 2158A duct)
• Installation clamps (not included)

Product Contains:
(1) – 4-inch x 25-foot UL 181 class 1 air connector