…"106 employees kept daily assessment records of their office environment and health over a 12-week period. Temperatures about 23 degrees Celsius were associated with increased sensations of stuffiness, discomfort, and unpleasantness, but appeared to produce a decrease in the number of complaints of headaches. The office environment was found to be depleted of small air ions. The introduction of a negative ion generator increased the subjective rating of alertness, atmospheric freshness, and environmental and personal warmth. Ions reduced the complaint rate for headache by 50% and significantly reduced the number of complaints of nausea and dizziness."…
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