Here is a look at three types of ducting that can be used within domestic ventilation systems to give you a better understanding of the best time to use each one and their benefits.
Rigid ducting can be used as a single component or as part of a bigger ducting system. Rigid ducting should be the first choice and should be used when possible in ventilation systems. There are two main materials used for rigid ducting: plastic and Expanded Polypropylene (EPP). Plastic ducting is used for most installations, but EPP ducting will be the preferred material when the ventilation system is outside or passes through areas that are unheated. This is due to the anti-static protection that EPP gives.
The ideal use for semi-rigid ducting is when installing a whole ventilation system at home. High-quality semi-rigid ducting provides the following benefits:
• It can swap between oval and round ducting without losing any system performance
• It has zero leakage, which allows the ventilation system to work to its optimal performance
• There is a 70 percent reduction in installation time
• It offers SAP Appendix Q points
• It offers high crushability levels
• They offer an anti-static and an antibacterial lining
• It is easy to clean once it has been installed
Flexible duct is ideal for situations where rigid ducting is not possible due to space restraints or awkward corners. There are four main materials used: PVC, PVC-coated aluminum, aluminum and insulated aluminum in offerings like those at https://www.dustspares.co.uk/flexible-ducting/. PVC is the most economical. It’s also extremely versatile and can be used in most ventilation systems. PVC-coated aluminum offers added protection against corrosion and tears damage, which is good for cooker hoods in kitchens. Here are some useful tips for using flexible ducting in your ventilation systems:
-1.5 meters should be the maximum length for axial fans
-6 meters should be the maximum length for centrifugal fans
-2 is the maximum number of bends the ducting should have depending on the rate of flow
All flexible ducting should be pulled taut to reduce resistance and maximize the full internal diameter. The ducting should be insulated with the equivalent of at least 25mm of thermally conductive material when passing through unheated areas to minimize condensation.