Boopathy AHU-Division

Fiberboard Air Ducts ​Fiberboard air ducts are constructed with boards of compressed resin bonded inorganic glass fibers. They have a foil face on the outside that serves as the air barrier and water vapor retarder. The interior of fiberboard air duct is sealed to prevent fiberglass fibers from entering the air stream. Fiberboard air duct also provides acoustical and thermal benefits, and are typically the most inexpensive air duct systems to install. This type of duct is good for cooling and heating systems because it is well insulated by itself. However, it is not recommended for ventilation because it can become a breeding ground for mold and mildew in humid climates. Also, because the surface is rough, it can affect airflow and efficiency. Fiberboard ductwork is also convenient because it can be fabricated to any configuration in the field, which is helpful when the roof framing is blocking a typical installation. Flexible Air Ducts Flexible air ducts are constructed with a spring steel wire helix, encapsulated in a 2-ply, polymer plastic. Flexible air ducts are inexpensive, lightweight, and easy to install. It is important that the lengths of the flexible air ducts be kept as short as possible as the amount that they bend greatly effects system performance. Typically, flexible ducts are tube shaped and are the second least expensive type of ductwork. This type of ducting is best in tricky spaces where rigid ducts are just not possible to install, or used to attach non-flexible ductwork to an air supply outlet. Kinks, bends, and turns need to be minimized in installation, as these issues reduce air flow and could hamper the efficiency and effectiveness of the air conditioner.