if we switch a fan in a vacume room , will it give air?
361693
Nope.  A vacuum (not "vacume") means that there's not any air to begin with, and because a fan cannot produce air, only move it around, no air will be given off.
742139
An energy-efficient, carbon-composite, centrifugal fan designed to direct a high flow rate of air from above to the radially outward direction driven by an electric motor.\n\nWhy do you ask?  Do you have any good referrals?
841873
Do you want cooling effect or warm?\nPl. read:\n\nStandard ceiling fan controls usually include one for speed (high, medium, low, and off), one for the light (on and off), and one for directional control of the fan blades (clockwise and counterclockwise). These vary depending on the make, model, and age of the fan; computerized and remote-controlled ceiling fans are becoming very popular as the technology becomes regularly available.\n\nCeiling fans are normally used as a cooling device in warm months by pushing air down from above, thereby creating a wind chill effect. In winter months, a ceiling fan can act as a heat transferrer by reversing the direction of the blades. By doing so, the fan pulls air up, thereby pushing the warmer air that stratifies near the ceiling down along the walls; as long as the fan is set at a low speed, this will not create a wind chill. A fan on reverse has the leading edge of the fan blades being the downward edge; in most cases this rotation is clockwise when the operator is standing below and looking upwards at the fan.\n\nActually it is not that simple. If you have a standard ceiling height (~8 feet) then you want to run the fan in the clockwise direction during the winter. Specifically, the ceiling fan blades should be running with the lower edge of the blade being the leading edge into the air. Having the leading edge of the fan blade down will pull the air in the room upward which pushes the warm air hovering near ceiling outward and forces it to mix with the rest of the air without creating much turbulence or breeze. Although it is a common sense explanation to run the fan in the opposite (counter clockwise) direction pushing the warm air down as a direct force, this also creates a breeze in the room (giving an undesired ‘cooling’ effect) and is therefore not effective for standard ceiling heights.\n\nFor high ceilings (greater than 8 feet) you want to run the fan in the counterclockwise direction during the winter. Specifically, the ceiling fan blades should be running with the upper edge of the blade being the leading edge into the air. Having the leading edge of the fan blade up will push the air near the ceiling downward into the room. The breeze created by operating the fan in this direction will be undetectable at low speeds since the fan height is tall enough that the breeze has dissipated before reaching the room height where people would notice.
872563
I do. If I dont have air circulating on me, I get sick to my stomach and get a bad headache. I sleep with a ceiling fan on, and a little personal fan on my nightstand. I have a little 6 inch fan I keep on my desk at work also. Winter or summer. They are always on me.
287753
change the fan, get a new one.
437631
air...or dirt...or..hmm..how bout you go and find out
1063868
Heat air goes up in circles and flies just use air to help during their annoying activity. \n\nIn center of your room, air will invcrease temperature and being pushed by your walls temp. Then, in middle of it, you will have a small imperceptle "hurricane" of hot air. \n\nYou will hardly see it in ope spaces and excelent curiosity gift; \n\nlooks that you have a lot of free time.
144220
Shouldn't be!\nIf you are experiencing an odd smell I suggest you check the flue (see Link 2.).\nIf you are worried about fumes in the room then there is probably something wrong with the flue and the correct air-flow is not occuring.
81125
Yes,sounds like over-heating of the power supply unit.It was switching itself off every time it got over-heated.Most probably the cooling fan inside the power unit was not working.
603694
That might blow dust into your CPU.\n\nI do not think the performance of your computer is because of the fan. It is probably a coincidence.\n\nTry going into your task bar and see what else is running that might be slowing you down.
675958
It proably is the cooling fan, or related to it. First try getting something like compressed air, sorry ask someone who knows better for the best answer, and get the vents cleaned out and the dust off the inside. If it still doesn't work depends on how well you know what you are doing. Either take out the fan and replace it, or take it somewhere that does computer repairs and have them replace it.
962570
It will flow in either direction if the voltage is above 0.7 volts
996316
Just check is there is something in the Fan went, even a small pice of dust can make a difference, You can try cleaning it up if you are confident about it or better take it to a PC Doctor or call the support.\n\nRegards,\nChethan
485249
It is not clear exactly what you wish to achieve but the natural way to ventilate a space is to have inlet openings near the bottom of the space (with in a foot or so of the floor) and outlet openings at the peak of the room. The all of the inlet openings should be evenly space around the perimeter. The outlet should run the full length of the roof peak if possible. The area of the inlet and out openings should be equal with the outlet opening slightly larger in area if possible. \n\nThis arrangement permits convection currents to keep fresh air coming in near the bottom of the space. There will be an area in the center of the floor that will not be very well ventilated unless the space is relatively narrow.
620015
Check your power-supply fan.
703957
well, the fan motor is doing the actual work, so technically it's the motor that's pushing the air... or more accurately, the motor causes the blades to rotate, which in turn pushes air forwards due to the tilt of the blades and the air foil that forms as a result.
605559
It does heat up the room, but it has two other effects: the constant stream of relatively dry air it evaporates moisture from your skin faster. Also conduction.  If the air and you are still, the air right next to your skin will be a bit warmer than the air further away, because it is colliding with your warm skin and takes some heat from you, but warms up in the process.  Cooler air blowing past will conduct heat from your skin more efficiently.\n\nThe molecules in water move at a variety of speeds. The "average" speed determines the temperature (it isn't exactly an average, but sort of is) but some move faster and some mover slower.  The faster ones escape and go flying into the room, and that brings the "average" energy of the water left a down a bit. This is why when you are wet after bathing, a humid room feels MUCH warmer than a dry room that is the same temperature; water molecules in the air stick to your skin just as often as the quick ones leave.  In a dry room this does not happen so the net effect is the higher energy (faster) water molecules leave preferentially and what is left is a bit cooler.\n\nIf the air is still, you end up with a bit more water in the air right next to, kind of like being in a humid room.\n\nThe second reason, increased conduction is similar, except the air is warmer right next to your skin because air molecules near your skin tend to collide with the ones IN your skin.  The ones in your skin, being a bit warmer, tend to lose energy to the air.  It cools, and the air warms, BUT conduction is more efficient when the temperature difference is larger. So, once the air next to you warms up a bit, you lose heat energy more slowly. Now, if you have a breeze, there is a steady supply of cooler-than-next-to-your-skin air coming in contact with your skin, so the cooling rate is larger.\n\nYou are correct that the fan will on average heat the room up more, but your body may end up cooler.\n\nThis reminds me of people who sit in front of the refrigerator with the door open on a hot day.  You might feel cooler, but the inefficiency of the fridge compressor means more heat goes into the room than the room is cooled off, but you, being right next to the fridge will be cooler perhaps than otherwise.