According to the Environmental Protection Agency (EPA), Americans spend up to 90 percent of their time indoors. Outdoor pollutants are usually filtered by natural air circulation, but indoor air must be adequately circulated to bring in fresh air and remove air with pollutants.
Properly install a heating, ventilation, and air conditioning (HVAC) system to provide good indoor air quality. This means suiting an HVAC system differently to spaces occupied by people, as opposed to storage spaces like attics. People, furniture, and building materials release pollutants into the air. The HVAC system should be installed to provide continued circulation of an outdoor air supply without obstruction. HVAC equipment must also be properly maintained. This could mean regularly checking all essential parts and changing filters.
Another aspect of proper ventilation is temperature control. Damp, humid workplaces can cause more workplace absenteeism and less productivity from allergies, illness, and discomfort. Keep humidity between 30 percent and 60 percent to create a comfortable environment. Maintain airflow rates in ventilation systems at a relatively unnoticeable three to six inches per second to prevent drafty spaces. Indoor temperatures should be between 68 and 74 degrees in a heating season and 73 to 78 degrees in a cooling season to reflect changes in employee attire.
Temperature is most efficiently maintained when equipment that emits hot or cold air, such as refrigerators or computers, is not placed near temperature gauges. Poor placement causes HVAC systems to unnecessarily emit heated or cooled air for longer periods of time.