|Supplier Product Code||2|
|Main Markets/Key Customers||Heating Ventilation & Air Conditioning Duct|
|Delivery Terms||On Cash Payments|
|Delivery Lead Times||Just After Order|
|Payment Terms||40% Advance & 60% Against Performa Invoice Before Dispatch|
|Price Information||RS 10 TO 15 INR|
Flexible ducts (also known as flex) are typically made of flexible plastic over a metal wire coil to shape a tube. They have a variety of configurations. In the United States, the insulation is usually glass wool, but other markets such as Australia, use both polyester fibre and glass wool for thermal insulation. A protective layer surrounds the insulation, and is usually composed ofpolyethylene or metalised PET.
Flexible duct is very convenient for attaching supply air outlets to the rigid ductwork. However, the pressure loss is higher than for most other types of ducts. As such, designers and installers attempt to keep their installed lengths (runs) short, e.g. less than 15 feet or so, and try to minimize turns. Kinks in flexible ducting must be avoided. Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderatenegative pressures. The UL181 test requires a negative pressure of 200 Pa.