Temperature, relative humidity, air movement, odor, and air cleanliness are important when providing a comfortable environment for learning. The human organism is highly adaptive, but a student cannot attend, perceive, or process information easily when his or her physical environment is uncomfortable. Air temperatures of 68 degrees to 70 degrees, 30 inches above the floor (20 degrees to 21 degrees C at 76cm) for primary grade students engaged in sedentary classroom activities and temperatures of 68 degrees to 74 degrees, 30 inches above the floor (20 degrees to 23 degrees C at 76cm) for older students seem to be both healthful comfortable during the heating season.
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