wht s the better way to natural ventilation of hall ? plz provide the links if posible?
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.
527048
Cut a hole and mount a small enclosure cooler (alcohol vapor)\n\nIf cutting a hole is not an option then fabricate a heat sink and have the cooler blow on the heat sink.\n\nuse a simple house type thermostat for temperature control.
381553
You should use high velocity air conditioning, sometimes called mini ducts.  This uses 2" flexible tubing, and is really ideal for retro fits.
889690
You might want to consider using a double wall, with air in between the inner and outer wall. If I remember correctly, air is a very poor heat conductor. Of course, like someone suggested, vacuum would be better, but that's a bit of a stretch. Air would probably work almost as good. The walls should be made out of thermo-insulants (ebonite, I believe)  and/or high heat capacity materials. Covering the outside of the box in aluminium foil would help, if the heat was generated by a source of light (like the sun), but would useless if the heat came from somehwere else. Likewise, painting the box in black would help the water inside stay warm. Covering the inside of the box  with aluminium is as useless as having knees on a fish. Unless you decide you want a lightbulb in the box, for whatever purpose, I'd say it's a waste of time and materials.
775803
With insulation.  Put it between walls or floors.
1099692
Get a loft if your school permits it.  It opens up a lot of space and you can decorate the wood of the loft any way you like.  A lot of people I know paint theirs to match tho other room decorations and carpet.  Also, an alternative to painting the walls is to find a wrapping paper that you like the patten of (probably something that is repeated, like squares or something) an put it up on the walls with the blue tacky gum stuff like wall paper.
582693
get a damp cloth not too wet wipe over key board and then sit up on ends in front of a fan and let dry over night
932974
UNDERGROUND AIR TUNNEL SYSTEMS \nAn open loop, underground air tunnel system cools \nor heats the ambient air passing through it. This air is \nthen introduced directly into the conditioned space of a \nbuilding. In order to reduce the required tunnel length, \na closed loop system may be used. In this system, the \nair from the conditioned space, with some ventilation air, \nis recirculated through the underground tunnel. Open \nand closed loop systems can be useful for air \nconditioning agricultural buildings. However, the threat \nof air contamination from any possible bacterial growth \nNormally, heating and air conditioning systems have \naverage year-round COPs of about 2.0. However the \nCOPs of the systems utilizing underground air tunnels \nare much higher. For open and closed loop systems, the \nCOP can be as high as 10. By doubling the COP over \na conventional system, the energy input (energy that one \npays for) is reduced by 50 percent. \nIn addition to energy conservation, this technique \nalso increases the capacity of a conventional system.
478699
You will first have to contact your municipality and see if they allow outdoor "recreation" fires. We built one in our back yard and used redbrick to do it. Dig a pit aprox 1 to 1&1/2 feet deep, and as wide as you need it. Level out bottom. Line with redbrick. Leave sides earthen. You have to remember to not stack the bricks around the top, this will prevent air flow.If you want a finished look for the top use one layer of bricks turned on their side so the holes in the bricks let the fire get air. If you just want an outdoor fire ring that you can cook on look on Gander Mountain's website. You will need to order a catolog, it's free. They sell fire rings that are somewhat inexpensive and you can put your cooking racks right on top to cook. We have both and use the ring more than the pit it's easier and can be taken inside over he winter. I hope this helps you out. Good Luck!!!\nhttp://www.gandermountain.com
127568
1.  Do the easy things first.  Make sure that air gets to the air cooling system; clear leaves, dead raccoons, etc.\n\n2.  Since this is a chilled water system, make sure the water (or other fluid) is chemically correct.\n\n3.  Make sure the compressors are compressing properly, the pumps are pumping, and the fans are blowing.\n\n4.  If you get to #4, you're in major retrofit/replace territory.  You might get away with retrofitting with water cooling.  Otherwise, you'll have to gut the thing and start over with a bigger system.
554422
Get a couple of fans and make a "wind tunnel" effect, to move air thru your room, and not just push it around.  By pulling air from another room, you should be able to cool down yours.\n\nI found that putting a bowl (metal works best) of ice in front of a fan will cool things down until the ice melts.
1052775
Hmm...not that it's suspended in air or anything, but there is a white air vent and a white ceiling light above me. Not very exciting. I also have a popcorn ceiling so if you get bored you can come over and help me pick all the popcorns off. I've always wanted a smooth ceiling. :o)
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?
602307
add moisture to a room
112334
Air is a good insulator as far as it doesn't circulate. It has low conductivity (about 1,4 Btu/ft h ºF), but if you let the air circulate there can be a very good heat transmission due to convection.\nThat's why insulators try to trap small amounts of air inside, so the air stays immobile.\nVaccumm would be a much better insulator.
272305
An ice house..., covered in saw dust lasts all summer..., same with snow..., tree planters cover their trees in winter with snow then saw dust..., snow will last right til August / September...., so just put your cube in there...\n\nthere are many poor conductors for heat..., what I would do is wrap the cube in tin foil..., then wrap in white plastic (some people refer this as a cooler) or white foam..., etc....
553805
Basically any space not designed for humans to live in.\n\nOne enterance and exit (being the same)\nLimited ventilation\n\nThere is a line that has to be drawn with the use of this restriction as a broom closet is a confined space.\nIt's not designed for people to live in\nIt has one enterance, and no sendary form of ventilation.\n\nTherefore you would have to take precautions to go into it and get a broom.