Moving to the right of this zone, at higher temperatures, comfort is still attainable by increasing air motion e.g. by exposure to wind.

Moving to the left of this zone, at lower air temperatures, comfort is still attainable if added radiant heat is provided by increasing surface temperatures.

Moving to the right of this zone, at higher temperatures, comfort is still attainable by decreasing air motion e.g. avoid exposure to wind.

Moving to the left of this zone, at lower air temperatures, comfort is still attainable if added radiant heat is provided by exposure to the sun.