- #BATHROOM EXTRACTOR FAN FLEXIBLE DUCTING HOW TO#
- #BATHROOM EXTRACTOR FAN FLEXIBLE DUCTING INSTALL#
- #BATHROOM EXTRACTOR FAN FLEXIBLE DUCTING FULL#
Maintaining the ventilation system is also easier as the leading semi-rigid ducting systems offer anti-static and antibacterial lining and are also extremely easy to clean when installed. Some semi-rigid ducting systems also offer the installer versatility by allowing them to switch between oval and round ducting without losing any hydraulic pressure loss or system performance. High quality semi-rigid ducting systems also have high crushability levels with some able withstand up to 13 kN/m2 of force.
Furthermore, it can also result in a 70% reduction of installation time and also offer SAP Appendix Q points. Good quality semi-rigid ducting helps a ventilation system operate at its optimal performance, due to it being a zero leakage ventilation system. Semi-rigid ducting is viewed as the best type of ventilation ducting available and offers installers and those using semi-rigid ducting in their ventilation system a number of benefits. This type of rigid ducting offers anti-static protection and in the case of high quality products, is flame retardant to EU- 82 – DIN 4102 standards. However, EPP rigid ducting should be used in instances where the unit is outside or passes through unheated areas such as loft spaces. Generally speaking, rigid, plastic ducting is suitable for the majority of installations. Rigid ducting should be used wherever possible in a ventilation system, so to minimise duct resistance and bends in the system. Rigid ducting is available in both plastic and expanded Polypropylene (EPP) and can be used as part of a larger ducting system or as single component of the ducting. Most new Extractor fans (such as Manrose or Expelair models) have 100mm spigots. The old broken fans appear to fit into existing ducting pipes of approx.
The wiring isn't an issue for me - I'm confident with this.
#BATHROOM EXTRACTOR FAN FLEXIBLE DUCTING INSTALL#
PVC ducting is the cheapest one available, but is highly versatile and can be used in the majority of general ventilation connection applications, including cooker hoods. I've been asked to install extractor fans in a number of bathrooms in an old hotel. When the duct passes through unheated areas such as loft spaces, the ducting should be insulated with the equivalent of at least 25mm of material with a thermal conductivity of less than or equal to 0.04 W (m.K) to minimise condensation developing. The best practice length that the duct needs to be extended to is 90% of its maximum length.
#BATHROOM EXTRACTOR FAN FLEXIBLE DUCTING FULL#
Depending on the flow rate, the maximum number of bends the flexible ducting system can have is 2.Īny flexible duct system should be pulled taught to ensure that the full internal diameter is obtained, and resistance is minimised. The maximum length for flexible ducting should be no longer than 1.5 metres for axial fans, 6 metres for centrifugal fans (up to 30 l/sec) and 3 metres (from 31 l/sec to 60 l/sec). Flexible ducting is ideal when rigid ducting cannot be installed due to lack of space or due to an awkward installation. You will learn the best installation practices, the best times to use each type and the effect each type has your ventilation system pressure.įlexible ducting is available in the following materials: PVC, PVC coated aluminium, aluminium and insulated aluminium. During the course of this blog, these three main types of ventilation ducting will be explained to you. I'm basically looking for a solution to a problem I've not come across before - All advice would be extremely welcome.There are three main types of ducting used within domestic ventilation systems: rigid ducting, semi-rigid ducting and flexible ducting. I have gound some fans that have 99mm spigots, but I doubt this one mil difference will allow me to fit the ducting over them either.
#BATHROOM EXTRACTOR FAN FLEXIBLE DUCTING HOW TO#
Not having worked with existing ducting before, can anyone advise me how to get around this issue please? It's EXACTLY the same size, hard plastic, so won't fit.
What I expected was that there would be some 'give' in this to allow the 100mm radial to snugly fit over the typical 100mm fan spigot, but of course it doesn't. I've ordered a ducting reducer from 150mm to 100mm. I've been asked to install extractor fans in a number of bathrooms in an old hotel. I'm a recently qualified electrician (about 14 months or so). Hi everyone - First time poster - I'd appreciate some advice.
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