Not all duct liners are equal – verify before installation!

Not all duct liners are equal – verify before installation!

When selecting acoustic materials for lining ductwork, it is crucial to consider various factors, as there is a wide range of products available for this purpose. The objective is to minimize the transmission of noise through ducts, thereby enhancing productivity and creating improved work, living, and learning environments. Achieving effective noise reduction within ducts necessitates a comprehensive approach, encompassing sound mechanical design, vibration isolation, and insulation featuring noise-absorbing properties. Furthermore, duct liners used in commercial construction must adhere to specific code requirements when installed. Below, you will find a list of technical specifications that duct liners are obligated to meet according to the North American Insulation Manufacturers Association:

**1. Fire Resistance**
– Complies with NFPA 90A and NFPA 90B Standards for fire safety.

**2. Temperature Range (ASTM C 411)**
– Suitable for use in temperatures up to 250°F (121°C).

**3. Air Velocity (ASTM C 1071)**
– Can withstand a maximum air velocity of 6000 fpm (30.5 m/s).
– Service temperature must not exceed 250°F or drop below 40°F.

**4. Corrosiveness (ASTM C 665)**
– Does not induce corrosion on steel, copper, or aluminum.

**5. Corrosion (ASTM C 1617)**
– The corrosion rate, measured in mils per year, remains below that of a 5 ppm chloride solution.

**6. Water Vapor Sorption (ASTM C 1104)**
– Absorbs less than 3% of its weight in water vapor.

**7. Fungi Resistance (ASTM C1338)**
– Does not foster or promote the growth of fungi.

**8. Bacteria Resistance (ASTM G22)**
– Prevents bacterial growth.

Duct coatings remain the most cost-effective means of controlling both noise and temperature within a duct system. However, conducting thorough research before making a purchase is imperative to ensure that the chosen coatings meet the specified criteria. These standards have been established to guarantee the reliability of fibrous glass duct-lined systems, ensuring they deliver the desired levels of acoustical performance, thermal insulation, and indoor air comfort over the system’s intended service life.

If you are seeking acoustical duct liners, Sound Acoustical Solutions offers a comprehensive range of proven performers in the acoustical field. For more information, please visit our website.