The Builder’s Best 4″ x 50′ Foil Duct is a high-quality, professional-grade solution designed for use in HVAC systems operating under low to medium pressure conditions. Constructed with a multi-ply aluminum/polyester laminate and metalized polyester, this duct delivers strength, flexibility, and long-lasting durability. Its design includes a steel wire helix that provides sturdy support and ensures the duct holds its shape during installation and use. The encapsulated wire construction also prevents unraveling when the duct is cut to length, making it easier and safer to work with.
This foil duct features an airtight construction and a smooth inner core, promoting efficient airflow and reducing air resistance within the system. It meets strict safety and performance standards with a UL® 181 Class 1 Air Connector label and includes a UL® sticker every 10 feet for easy verification. Additionally, the duct meets NFPA 90A and 90B requirements, making it a dependable choice for a wide range of HVAC applications.
Designed for tear and puncture resistance, the Builder’s Best foil duct withstands job site handling and maintains its integrity over time. Its PRO performance level makes it suitable for both residential and commercial installations. Please note: this product is not intended for venting appliances used for cooking, heating, or clothes drying unless specifically approved and recommended by the appliance manufacturer. For HVAC applications demanding durability and reliable performance, this 4″ x 50′ foil duct is a trusted and efficient solution.
- Multi-ply foil design with aluminum/polyester laminate and metalized polyester offers strength, flexibility, and long-lasting performance in HVAC systems
- WBuilt with a steel wire helix that maintains shape, prevents unraveling when cut, and ensures easy, stable installation in low to medium pressure systems
- Smooth inner core promotes efficient, unrestricted airflow while the airtight construction helps maintain system performance and energy efficiency
- UL 181 Class 1 Air Connector label with a UL sticker every 10 feet; meets NFPA 90A and 90B for reliable use in both residential and commercial HVAC setups
- Tough, puncture- and tear-resistant foil ducting stands up to rough handling on job sites for dependable, professional-grade results
- Color: silver
- Dimensions (L x W x H): 18.75 x 11.00 x 5.25 inches
- Weight: 4.18 pounds
- Manufacturer warranty: 30-Day Warranty
Questions? We’ve Got Answers.
Helpful answers about product features, setup, and more
What material is the duct ul181 made of?
The duct ul181 is constructed from steel. This material choice supports everyday use while maintaining the structural integrity needed for the product’s intended applications.
How big is the duct ul181?
The duct ul181 measures 18.75 x 11.00 x 5.25 inches (length x width x height). Use these measurements to confirm the product fits your intended setup before ordering.
How do I clean and care for the duct ul181?
Wipe with a damp cloth and dry thoroughly to prevent rust. For powder-coated finishes, avoid abrasive cleaners that may scratch the coating. Regular light cleaning extends the lifespan of the duct ul181 and keeps it looking and performing well over time.
How much does the duct ul181 weigh?
The duct ul181 weighs approximately 4.18 pounds. Use this figure when planning transport, handling, or placement of the item.
What should I know about the duct ul181 before buying?
The duct ul181 brings together a few practical features worth highlighting:
- steel construction
Review the product description and specifications to confirm it matches your specific needs before placing your order.
How will the duct ul181 be delivered?
The duct ul181 ships from one of our fulfillment centers using standard ground or freight carriers depending on the size and weight of the item. Larger or heavier items may ship freight with curbside delivery. Estimated delivery dates and shipping methods are shown at checkout before you complete your order.
Reviews
There are no reviews yet.