The Key to this being successful is to have a Wind Tunnel type cacuum cleaner with attichments. You need two basic necessities for this to be an excellent source of ice cold air for a super HOT SUMMER. You need a hose to suck the air in and acanister which has a filtration attached to a cannister which need to be filled with ice. You can also reverse the air flow so that the suction hse will blow ice cold air by switching the positive and negative wire. If you have a Rainbow Vacuum that uses water to filter the dirt from the air could easily be converteg into a very good source of cold air. If you only needed one room cold at night it would be more than sufficient to cool off a 400 square foot room. It would be like adddind another central air conditioner vent to your room.