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Ventilate and Cool a Room, Cabin or Tent

Updated on June 26, 2016
Cool that stuffy cabin! by rlz
Cool that stuffy cabin! by rlz

We've all been confronted by the musty summer cabin, the baking campground tent, the steamy spare room over the garage, that's just unbearably stuffy and uninhabitable. But there are some simple steps you can take to try to unstuff that stuffiness.

For optimum ventilation and cooling, your cabin, tent or room should ideally have at least two fairly sizable openings, whether doors, windows, flaps or louvers. Preferably openings should be located on opposite or near-opposite sides. Better performance comes with additional openings, especially if located on all sides. It is best to have at least two openings aligned along the direction of breezes that might prevail during the hottest periods.

Ideally, if possible, the leeward opening (the outlet opening by which ventilating breezes would exit) should be larger than the windward opening (the inlet opening by which ventilating breezes would enter). This will tend to increase the speed of ventilating breezes, making them more effective. Also ideally, if possible, that leeward opening should be higher than the windward opening. Thus, the ventilating breezes will tend to naturally rise and exit as they gather hotter, stuffier room air.

A fan should be placed just inside the leeward outlet opening, directed so as to pull air from the room or space, pushing it out that leeward outlet opening.

For added cooling effect, a shallow pan of water or an unglazed clay pot (such as a solid flowerpot) filled with water can be placed just inside the windward opening, in the path of the incoming ventilating breeze. Water will evaporate from the pan or pot, thereby pulling heat from the air, and moisture landing on and evaporating from the skin will heighten the cooling effect. (This is well-known throughout the American South as a 'swamp cooler'.)

Larger, peaked or multi-level spaces can also be further cooled by the chimney effect. Low windows on lower levels can allow ventilating air to enter. As the air warms, it rises through the spaces, to eventually exit through high windows on higher levels. Through the suction of the chimney effect, replacement air is pulled in through the low windows, and the cycle repeats. The greater the vertical distance between low and high windows, the greater the chimney effect, and thus the greater the cooling effect.

See more at rickzworld.


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    • rickzimmerman profile imageAUTHOR

      Rick Zimmerman 

      8 years ago from Northeast Ohio

      Right you are, OGW.

    • onegoodwoman profile image


      8 years ago from A small southern town

      With our modern heating and cooling systems, many people do not understand that houses in bygone eras, were built by design. They did not just " go up ", they took advantage of nature. Hallways were built to draw in air, and windows to allow light.

      It amazes me, what we have forgotten due to all we have learned!


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