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Introduction
In determining the appropriate method of passive cooling for a building, first we
consider the two "C's"; comfort and climate. Comfort is a combination of
temperature and humidity, on the adapted psychrometric chart below, the blue
lines represent dry bulb temperature and the red lines relative humidity. The
blue shaded area is the ASHRAE comfort zone; between 68 and 80 degrees
Fahrenheit and 20 to 80 percent humidity.
In determining the appropriate method of passive cooling for a building, first we
consider the two "C's"; comfort and climate. Comfort is a combination of
temperature and humidity, on the adapted psychrometric chart below, the blue
lines represent dry bulb temperature and the red lines relative humidity. The
blue shaded area is the ASHRAE comfort zone; between 68 and 80 degrees
Fahrenheit and 20 to 80 percent humidity.
Below is a similar chart, but I have added the effective ranges for the common
methods of passive cooling.
methods of passive cooling.
Now we just need to get your climate into the chart to identify which methods will
work for your climate.
work for your climate.