***UPDATE*** A Word Of Caution***
We live in the inland northwest... beautiful country, mountains, lakes, mooses... you get the idea. As our climate is generally fairly mild, very few
homes have central air or A/C of any kind. We can, however, get pretty hot in the summer months... gonna be around 90 degs for the next week or so...
and the house can get pretty darned warm.
Fortunately, the humidity is pretty low... which is why this little trick works so well at cooling your living space with very little expense.
People living in the U.S. southwest are very familiar with this as many homes there are cooled in this manner...
It is called evaporative cooling... and it can be easily done on the cheap.
Mine uses a fan, an open window, a couple of old ratty towels and a water trough (actually a window planter box with the drain holes sealed)...
1. Find a suitable window: Only one prerequisite for this... it should open
and even better if there is a screen installed.
2. Take your old ratty towels (I used two... old cotton ones big enough to cover the entire window opening) and pin them to the top of the exterior
window frame so they hang down and completely cover the opening
3. Set your water trough at the base of your window (mine sits on an old wooden box) so the bottom of the towels sits inside
4. Cut vertical slits in the towels from the bottom of the window to near where the top of your fan will sit. The key to this is airflow, moisture
wicking, and surface area... (one slit every 3" or so works pretty good)
5. Soak the hanging towels and fill your trough with water...
6. Set your fan in the interior window casing so it now pulls air through your soaking wet towels and crank that bad boy up
7. As the exterior warm air is pulled in, the water on the towels evaporates and cools the air... the towels will continue to wick water upwards from
the trough (saves you from having go outside to soak them down every ten minutes).
8. Adjust your airflow. The trick to this is getting the air to go through at a rate which allows for rapid evaporation yet not so fast that the air
doesn't have time to cool... the size and number of slits you cut also expose more wet surface area in addition to allowing airflow... (my fan on high
was still pulling in warmer air... on medium, however, the air coming through is cooled by about 20 degs or so...)
9. Keep the towels wet... (I filled my trough twice yesterday and it was near 90 here)
As I said, it was near 90 here yesterday... the warmest it got in our house was 73...
edit on 7/20/2013 by tothetenthpower
because: (no reason given)