|
Often extraction is carried out in a fairly arbitrary fashion, an extractor fan is required so a trip to DIY supermarket is arranged and an extraction fan is bought off the shelf. This happens for businesses as well as domestic usage and there is a very good case for the installation of any extraction fan to be far more logical and based on a technical requirement. This has far more chance of resolving the problem in the correct manner. The problems with getting the wrong extractor fan system is that it can be too small and the room can suffer from part or non-removal of the offending problem, in a bathroom there may be a damp problem which builds up from poor steam removal. In another case the extraction may be too high and the room becomes very cold as energy is also pumped out of the room. Extractor fans which are too large in size may also suffer from noise problems but this can also sometimes happen with small fans and needs to be resolved by installing a low noise fan. The best way to start the process is to find the dimensions of the room from which extraction is necessary and then to work out the volume of the room in metres. For a typical bathroom of size 2 metres x 2.5 metres x 2.5 metres high the volume is about 12.5 metres. If a typical extraction fan built for a bathroom will extract about 85 cubic metres per hour, which means there will be about 6 to 7 complete air changes per hour. This is quite acceptable, the normal recommended rate for any room is at least 4 complete air changes per hour so for a bathroom this wants to be rather more. If the bathroom happens to be in a much larger house with twice the metric volume then the amount of air changes would only be 3 to 3.5 changes per hour which is quite low. The trick is to work out the volume of the room and then work out how many changes per hour would be ideal, from this the overall air volume required to be extracted can be found and a suitable extractor fan installed. Major businesses can have far more serious problems as there are recommended levels for most different businesses, for example supermarkets are recommended at 6 to 10 changes of air per hour whilst public houses may be 20 30 air changes per hour. Put the work in at the installation level, and save trouble later.
Related Articles -
extractor fan, extractor fans, wall fan, wall fans, bathroom fan, bathroom fans, extraction fan, extraction fans, extraction,
|
