In this argument, one person says it will suck out all the warm air leaving only cooler air, and the other says it'll suck out the cooler air leaving the warm.
2006-06-13 08:00:28 · 10 answers · asked by handsomepete2 2 in Science & Mathematics ➔ Weather
Every time I try to turn it, my boss keeps persistently turning it back pointing away from the little room I work in with the belief it will both make the room feel cooler and make the rest of the office feel cooler. I feel no difference, it's still very warm if not warmer.
2006-06-13 08:12:50 · update #1
the fan will have negligible effect, unless it can cause significant turnover in the room. Assuming it does, the location of the fan dictates its effect. At the top of the door, a fan would pull warm air and cycle in cool air near the floor. The opposite would occur if placed on the floor.
2006-06-13 08:09:32 · answer #1 · answered by scott_d_webb 3 · 3⤊ 0⤋
Starting with the assumption that the air outside the room is colder, the room should get cooler as the fan runs: you are drawing the warm air out of the room, and it must be replaced by something, so the relatively cooler air from outside the door will be drawn in around the fan to take its place. The fan only moves the air it has access to; it cannot differentiate between cold and warm air and separate them. The person arguing that the fan sucks out the cooler air may be under the assumption that the colder air, being more dense, will sink to the floor level and get sucked up by the fan, leaving the warmer air inside, but convection currents only occur when there is a difference in energy or temperature. Since your scenario does not specify that the air at head level is, say, 80F and the air at the floor is 40F, one has to assume that the air in the warm room is more or less consistent from floor to ceiling and therefore there is no stratification. Not only that, but as the cooler air is drawn in from outside the room, it mixes with the warmer air, thus cooling it as it absorbs some of the heat. Either way, the room should cool.
Of course, if there is no difference in temperature between the inside and outside of the room, the temperature will not change appreciably. You may experience a sensation of cooling if you are in the room, because the air moving through the room will help to remove some of the heat from your body (assuming your body is warmer than the air in the room) and will also facilitate evaporation fo sweat, thereby also removing heat (assuming the air also isn't really humid, preventing evaporation)
2006-06-13 08:12:29 · answer #2 · answered by theyuks 4 · 0⤊ 0⤋
The best way to cool down a hot room is to have the fan suck out the heat for a few minutes, then turn the fan around and have it blow cooler air IN the room! This air that you blow IN to the room is not stagnant and warm, it is new, fresh air, there for it will feel better and cool on your skin, thus keeping you cooler! P.S. If the air (outside) is cool, then the fan should be placed IN the window, to bring IN the new cooler air! Thus blowing the old air out the doorway and cooling the room!
2006-06-13 12:46:47 · answer #3 · answered by ? 5 · 0⤊ 0⤋
I don't believe that a fan will discriminate between cool or warm air. It'll likely just create air circulation within the room, making it feel cooler.
2006-06-13 08:11:32 · answer #4 · answered by theatrefox01 1 · 0⤊ 0⤋
Cooler. (Depending on where the heat source is) the fan will circulate ALL air in the room. If the heat source is a window, direct the fan away in a straight line from the window.
2006-06-13 11:57:07 · answer #5 · answered by timothy m 1 · 0⤊ 0⤋
it depends. all a fan does is move the air behind it and blows it in front of it. if there is a window in the hot room, the fan will suck the air outside the window into the room. if its cooler outside, the room will cool down, vice versa
2006-06-13 08:27:25 · answer #6 · answered by Mike B 2 · 0⤊ 0⤋
If you open the window to replace the air being exhausted the room will become cooler, if the outside temperature is cooler than the room was ~ and vice versa.
2006-06-13 08:11:40 · answer #7 · answered by love2travel 7 · 0⤊ 0⤋
The followers' autos generate warmth. there's a internet inflow of warmth switched over from electrical energy into the device. I remember an previous tale of an proprietor of a bar interior the Virgin Islands. each and every morning the owner might get carry of a block of ice, and can lug it over to a shelf decrease than the window, He might drape a sparkling towel over it, and for the total organisation day, a pair of massive followers might blow outdoors air over the ice block, offering cooled air to the clientele. The towel presented a "wicking" action to enhance evaporation. The water drained right into a pan with a hose to the outdoors.
2016-12-08 08:51:30 · answer #8 · answered by Anonymous · 0⤊ 0⤋
It won't change the temperature, but it'll circulate the air inside the room if it's facing outward.
Regardless, fans are largely inffective.
2006-06-14 05:17:21 · answer #9 · answered by Isles1015 4 · 0⤊ 0⤋
Neither. A fan neither cools or heats air, it only moves it. The movement is cooling to your body. My recommendation would be to point it into the room.
2006-06-13 08:08:12 · answer #10 · answered by Daniel A 2 · 0⤊ 0⤋