Which material to choose for your application?
The material composition of a flexible duct is one of the most important factors to consider for your intended application. A flex duct’s material can determine the difference between the success of your application or its failure. Certain materials are better suited for specific applications compared to others. For example, if you have a high temperature application involving temperatures beyond 400° F, it is best to use a flex duct made of silicone or stainless steel or silicone because those materials can survive contact with extreme temperatures much better than PVC or a neoprene-coated fabric.
What should I consider for Air Movement applications?
To put it simply, an air movement application is any application that involves the transfer of air. This typically involves the transfer of cold or hot air for HVAC (heating, ventilation, and air conditioning) purposes, but it also applies to other gases such as smoke and light fumes. When looking for a flexible duct for your air movement applications, you want to consider what specific type of air being transferred. It is best to know the temperature and whether the situation calls for positive pressure (blowing) or negative pressure (suction). Temperature ranges in HVAC applications typically do not go beyond 180° F, so a flex duct made with PVC is a good option to consider.
What should I consider for Light Dust applications?
Flex ducts are regularly used to transfer light dust particulate away from a specific area. This is often done for safety reasons in many occupational fields because dust can be harmful to health. The type of dust involved in these applications can vary from very fine wood dust to fertilizer particulate. You want a hose with a firm but flexible body. The right mix of durability and flexibility makes PVC great materials for a flexible duct. For the more heavy duty dust applications, such as in debris-related dust collection, flex ducts made of neoprene coated fabrics, thermoplastics, and urethane in that order come highly recommend in the industry.