Rp: Outdoor air required by person (CFM/Person). Vbz: Breathing Zone Outdoor Airflow (CFM), The minimum outdoor air required is defined as Breathing Zone Outdoor Airflow and can be calculated: For example, a person dancing needs more oxygen than one sitting in the office. ZONE OUTDOOR AIR QUANTITIES (CFM/ZONE)Īmerican Society of Heating, Refrigeration and air-conditioning Engineers published a standard known as ASHRAE 62.1 to specify minimum ventilation rates and air quality that will be acceptable to human occupants.įor each zone, depending on the occupants’ activities and the function of the space. Annoying: With impact on productivity and sense of well-being. Health Threatening: Such as allergens, volatile organic compounds, bacteria, viruses, mold spores, ozone and particulate.Ĥ. Carcinogenic: Cancer causing substances.ģ. Fatal in Short Term: These include chemical substances such as carbon monoxide.Ģ. Although those annoying aspects will immediately draw your attention, you should be more concerned about the hidden contaminants that affect your health.ġ.
You can tell the space is inadequately ventilated when you continually smell kitchen odors in your office, or you feel sleepy and not comfortable. Thus, proper considerations about the indoor air quantity and quality should be taken into account when designing HVAC system for a building. If you are one of the majority of people who spend most of their time indoors, then you should know that the air you breathe inside a building can be more seriously polluted than the outdoor in even the most industrialized cities.
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