Instead of air conditioning, I have heard of people using a fan to take in the cooler air from outdoors. But Is it more effective to blow the hot air from indoors out (face the fan outwards) or take in cool air from outdoors (face the fan inside)? Or is it even better to circulate the two together?
2006-07-04 11:27:03 · 9 answers · asked by Kim V 1 in Environment
You cannot do one without doing the other. If you think about it if you were to pump cool air into your house without letting any air out it would pressurize your house and it would eventually explode. So if you take cool air in, it must also blow hot air out. They are not really different.
Having said that if you can sit in front of the cool air fan blowing into your house you will feel that cool air before it has a chance to mix and heat up and that might may you feel more comfortable. However both will cool the entire house the same amount.
2006-07-04 11:35:03 · answer #1 · answered by Engineer 6 · 0⤊ 0⤋
Living in Queensland, Australia with only natural cooling we have developed a system similar to the ones mentioning water and fans. Place a dish of water or suspend a damp cotton sheet between you and the fan. The air will cool as it passes through it. Do not allow any sun to reach the inside of your house. Cover any west facing windows with awnings, vegetation or a reflective foil. You can buy this at a hardware shop and do it yourself or get a tradesman to do it. Or close the curtains if you cannot get the foil. Install a "Whirley Bird". I don't know if you have these, but they look like a jet plane propellor which is installed on the roof of your house. As the wind blows it turns the propellor and draws the hot air from your roof cavity up and out through the "propellor vents". You can get power generated ones too. Good for days when there is no wind. Also depending on the air temp. outside I would close all windows that are open to a hot wind and open those on the opposite side of the house. Remember, you can't cool your whole house so just concentrate on the areas you are in. At night, open every window and place a damp sheet between you and the fan again. Hope this helps.
2016-03-27 03:57:24 · answer #2 · answered by Loretta 4 · 0⤊ 0⤋
I'm not sure where you live but here goes.
Convection is a good alternative but requires a circulation path.
If you are able to, let the hot air rise and vent. Open the windows to let cooler air inside. Forcefully removing the heat from the source is best. If you can open windows on either side of your room or house and put a fan where it diects the warm air outwards to see if this works. Preventing the sunlight from entering the windows is a good idea too because that's the heating source.
Check out your PC, the fan directs hot air outwards while allowing cooler air to displace it via holes (else) in the case.
2006-07-04 12:18:37 · answer #3 · answered by Donald S 2 · 0⤊ 0⤋
I believe it is more effective to take in the cool air. I recently came to that conclusion when I placed my fan right up against the screen of my window so the fan can bring in the cooler air in. For years I have always thought otherwise, I would always place my fan on the opposite side from which my open windows faced but it was like my fan would blow the cool air out as soon as it came in. I suggest face the fan inside, it really works.
2006-07-04 12:00:35 · answer #4 · answered by fishnchips 1 · 0⤊ 0⤋
adding a whole house fan can help cool your house, but only if the temperature outside is cooler than it is inside, and only if the fan will exchange ALL the air in your house in no more than 2 minutes. Some people will put fans around the perimeter at the lower level to blow cool air in, and another large fan (in the attic, usually) to blow hot air out.
When the temperature outside exceeds the temperature inside, just turn on the AC, and close the fan vents.
2006-07-04 11:34:03 · answer #5 · answered by © 2007. Sammy Z. 6 · 0⤊ 0⤋
If the outside air is cooler than inside the hot air will move that way anyway on its own (hot moves to cold).
Put the fan in a window facing out and open another window for a cross breeze. The hot air will be blown out and the cool air will be drawn in.
Be careful with high humidity because in that condition its difficult for you body to cool itself (your sweat doesn't evaporate so your natural cooling mechanism is out of service).
2006-07-04 11:32:58 · answer #6 · answered by ideogenetic 7 · 0⤊ 0⤋
Blow the hot air out. Cool air then comes in through the open windows. That is the way to go.
2006-07-04 11:31:50 · answer #7 · answered by Jenny A 6 · 0⤊ 0⤋
what we do here is when it starts to cool off at night we put the fans in the window to pull the cool air in, and before we go to bed we take them out and keep the house shut up so that the cool air stays in all the time... but if you get up early enough its also nice to keep them in all night, we've been doing this since i was a baby and im 15. its always worked for us... hope this helps!
2006-07-04 11:33:10 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Doing both is best, but notice which way the natural air is moving outdoors. Don't have your fans working against the natural breezes.
2006-07-04 16:10:59 · answer #9 · answered by Emee 3 · 0⤊ 0⤋