Search the forum,

fan

A fan is a powered machine used to create a flow of air. A fan consists of a rotating arrangement of vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing, or case. This may direct the airflow, or increase safety by preventing objects from contacting the fan blades. Most fans are powered by electric motors, but other sources of power may be used, including hydraulic motors, handcranks, and internal combustion engines.
Mechanically, a fan can be any revolving vane, or vanes used for producing currents of air. Fans produce air flows with high volume and low pressure (although higher than ambient pressure), as opposed to compressors which produce high pressures at a comparatively low volume. A fan blade will often rotate when exposed to an air-fluid stream, and devices that take advantage of this, such as anemometers and wind turbines, often have designs similar to that of a fan.
Typical applications include climate control and personal thermal comfort (e.g., an electric table or floor fan), vehicle engine cooling systems (e.g., in front of a radiator), machinery cooling systems (e.g., inside computers and audio power amplifiers), ventilation, fume extraction, winnowing (e.g., separating chaff of cereal grains), removing dust (e.g. sucking as in a vacuum cleaner), drying (usually in combination with a heat source) and providing draft for a fire. Fans also have several applications in the industries. Some fans directly cool the machine and process, and may be indirectly used for cooling in the case of industrial heat exchangers.
While fans are often used to cool people, they do not cool air (electric fans may warm it slightly due to the heat produced by their motors), but work by evaporative cooling of sweat and increased heat convection into the surrounding air, due to the airflow from the fans. Thus, fans may become ineffective at cooling the body if the surrounding air is near body temperature and contains high humidity.

View More On Wikipedia.org
Recent contents Top users
  1. A

    WB Greenstar 37cdi fan runs constantly

    My 37cdi is in holiday mode and Eco mode, with all temp settings at minimum. However the fan ,or something, seems to be running continuously. The only way to stop this is to switch the boiler off. I do need hot water occasionally and I leave it switched on for this reason. What is running?
  2. A

    Potterton performa fan fault

    Hi everyone, I am going to look at a performa this evening. The customer called this morning, said its showing fan fault and he's 'narrowed it down to pcb or fan'. Sounds like he is going to be great, he has wired up loads of boilers apparently. What checks can I do to test the components...
  3. M

    Alpha cb24 fan fault or blocked flue

    Hi all. I just want confirmation on my diagnosis of a cb24 fault. Basically pump runs but fan doesn't and no 240v at fan terminals on fan or pcb. So it's a PCB fault? Lights flashing simultaneously which is a flue fault. Alpha technical not answering, only taking messages. Thanks
  4. L

    Vaillant Ecotec F32 Fan Fault

    I have Vaillant ecotec 838 with F32 fault. I have had the fan and PCB changed but still get the fault. When the fault comes up the fan is still running!! Any ideas?
  5. Stoney Ground

    WB 18ri fan running when no call for heat

    Got above where when heating switches off boiler is getting a feed from somewhere, causing clicking noise as it tries to go through start sequence. Where would it get it from, through cylinder Stat or 3 port. Going there tomorrow to check it out but wanted to grab a replacement just in case.
  6. S

    Worcester 28I RSF Fan replacement

    Are these straight forward to replace? Looks like 2 wires, couple of air pressure tubes and 4 screws and it should come out?
  7. O

    Bathroom fan .... ........

    hi lads, Could anyone of you give me an advise on a pod bathroom fan which is quite powerful and quiet running. I was thinking to install Kair heat recovery I have installed few times. I wanted something a little bit less pricy but still powerful. What are you guys installing usually ...
  8. E

    Ideal turbo 2 seconed fan

    Hi Guys went out to a Ideal turbo 2 boiler making a noice yep that's the fan when I got the boiler case off it has two fans one on top of the burner blowing down and a second one on the bottem! any one know what the second one is for. Changed the top one boiler now working fine
  9. Tschaka

    Extractor fan vs gas fire

    Hello to all Gas Safe Engineers. Our kitchen extractor fan is affecting the updraft of our gas fire stove. Our engineer disconnected it and told us to clean the chimney and install extra ventilation in our lounge. We did this but it is still a problem. The engineer has suggested we contact...
  10. A

    Baxi Duo-Tec 24GA - Fan only on, no display when switched on at mains

    Having issues with the boiler making a arcket when hot water/heating running, sounds like combustion needs resetting as it runs perfectly for 10 minutes then error E comes up and flame symbol. Boiler restarts and runs perfectly again until next time which could be never or 30 minutes Service...
  11. A

    Ideal Logic heat 24 fan - cycles on and off all night (when in an off mode)

    Hi, I have an Ideal Logic Heat 24 boiler, but even when in off mode on the programmer, it constantly starts the fan up for a few seconds and then shuts down again. Any ideas please? Not good for light sleepers!
  12. P

    Very old fan convectors changing to radiators ?

    Evening all. i am involved at a voluntary run sports club with a clubhouse onsite which needs some upgrades. Like everywhere money is tight and looking for some advice. We have a boiler that used to run on oil but is now converted to kerosine which is cheaper. We have 2 main rooms. one room is...
  13. Ted808

    bathroom extractor fan

    Hi Guys Can I wire in a bathroom extractor?. Cables are in solid ceiling. Can only access cord pull for light and light fitting- seems like there's L N E in the light fitting and L SL in the fitting - the fan has a timer I think I got the wrong one. Cheers ted :willy_nilly:
  14. jaydebruyne

    Fan Pressure Test

    So I did my first full Worcester Greenstar service today.. cleaned out the burner and didn't bother testing the fan pressure to see if it needed it or not. Mainly being that the mis say to do it with a digital gauge and I don't have one. Can it not be done with a normal u-gauge?
  15. C

    Warm Air Heating Fan Not Turning

    Hi. I've just bought a house that has an old Johnson & Stanley warm air heating system. Everything seems fine apart from the fact that the fan does not turn when it kicks in. If i leave it for a minute or two the casing of the fan itself gets really hot and there's a definite burning smell comes...
  16. B

    Keston C36 Combi - Intermittent error E05 - Fan related

    Hello fellow members - Being first time buyer, I'm having to deal with boiler problems for the first time myself, so please excuse my ignorance on the matter. Keston C36 Combi is installed in the basement. Age of the boiler is around 9 years and has been serviced ever since every year by the...
  17. M

    Green star 24i fan running constantly

    I've got a fault with above and I have a nagging suspicion that it is a fan fault although everything is pointing towards pcb. Have I just imagined this is the problem with the fans?
  18. sammathias

    Worcester 30cdi fan pressure

    Done a service last week on a worcester 30cdi. FGA reading of 0.0006 meaning no need for a full stripdown. Fan pressure of -2 meaning the heat exchanger should be cleaned. Baffled.....so anyway got a service kit and done a full clean, didnt seem necessary tho as it seemed reasonable clean. What...
  19. S

    Vaillant TurboMax Plus Boiler Issue - Fan not working

    This week my boiler failed giving an S.33 message "Check air/flue system" message. My plumber came around and identified the problem as a failed fan. I had my old fan handy (I replaced it 4 years ago due to it becoming noisey). He fitted that and all was well. However, when I next tried the...
    • Searcher2
    • Thread
    • boiler could engineer fan issue not working oil plumber plus problem turbomax vaillant working
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  20. J

    Wet Room Bathroom Q's - Cladding, Underlay, Fan

    Hello gents, Many thanks for your information on the Shower System I have decided to go for the Hansgrohe, I just have a couple more questions I hope you don't mind helping with, As I'm having tiles on the flooring in my wet room due to my disability, I am just wondering what is the best...
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Tile Talk
DIY Advice
Tiling Forums
BS 5389 Tiling Standards
Tiling News
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock