UL 181 is a requirement applying to materials in the fabrication of air duct and air connector systems. The differences between an air duct and air connector lie in the testing they undergo by UL and as a result, the allowed uses by code.
What is UL 181 class 1 air duct?
Class 1 – Air ducts and air connectors having a flame-spread index of not over 25 without evidence of continued progressive combustion and a smoke-developed index of not over 50.
What is a class 1 air duct?
What is Class 1? Class 1 represents a material which shall have a flame spread rating of not over 25 without evidence of continued progressive combustion and a smoke-developed rating of not over 50.
How many UL standards are there?
With over a century of experience in the development of more than 1,500 Standards, UL is an accredited standards developer in the US and Canada. In extending its global public safety mission, UL Standards partners with national standards bodies in countries around the world to build a safer, more sustainable world.
What is shurtape DC 181 used for?
DC 181 is designed to prevent air loss when connecting, joining, sealing and patching flexible air ductwork: Excellent conformability to uneven surfaces. Easy to unwind. Hand-tearable.
What does UL stand for in HVAC?
Luckily, UL (Underwriters Laboratories) approved products make that decision simpler, ensuring required standards are met such as safety, sustainability, performance, and quality.
What is class 0 flexible duct?
In order to achieve “Class 0”, the duct must have a Flame Spread Value equal to 0 and a Smoke Developed Index equal to 0 when tested to the Surface Burning Characteristics test (UL723, ASTM E-84).
Which duct standards are published by Underwriters Laboratories?
UL 181 : UL Standard for Safety Factory-Made Air Ducts and Air Connectors.
Which type of duct undergoes more rigorous testing?
14 feet. Which type of duct undergoes more rigorous testing before it is labeled? Flexible duct.
Is Class 1 duct tape on dryer?
No! Do not use duct tape to seal a hole in your dryer vent or connect it to the wall or for any other reason. Duct tape should also not be used on your air ducts.
What is Class 1 duct tape used for?
UL 181B-FX Listed film tape for use on Class 1 Flex Duct for connecting, joining, sealing and patching flexible air ductwork. DC 181 features an acrylic adhesive system, high performance in temperatures ranging from -10 F to 210 F, and is clearly printed with the UL Listing to ensure every job is code compliant.
What is FlexFix tape used for?
Description. FlexFix™ UL181B-FX Film Tape is a tough, contractor grade closure system for Class 1 flexible air ducts and connectors, sealing reflective and bubble insulation and suitable for metal to metal connections in HVAC and refrigeration applications.
What does UL classification mean?
UL classified means the producthas only been evaluated for specific properties, with regard to a limited rangeof hazards, or for use under certain conditions. UL certified products are justas safe as UL listed products, but they should only be used in certainsituations.
What is UL mean?
Underwriters’ Laboratories, or UL as it is universally known, tests and evaluates components and products that allows a certification mark to be placed by the manufacturer. Most common are the “UL Listed” and “UL Recognized” marks.
What is UL unit of measure?
A microliter is a unit of volume equal to 1/1,000,000th of a liter (one-millionth). A microliter is one cubic millimeter. The symbol for microliter is μl or μL.
What kind of tape is used for dryer ducts?
The best way to seal the inside and outside of the dryer vent is with aluminum tape. It is not likely to get lint. When exposed to heat, aluminum tape will not peel or crack.
Is Flex fix tape heat resistant?
Answer: Flex Tape can be applied in temperatures From 20 degrees F up to 120 degrees F. Flex Tape will function in extreme heat up to 200 degrees F.
