Outdoor Makeup Air
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The purpose of ASHRAE 62 - Ventilation for Acceptable Indoor Air Quality standard is to specify minimum ventilation rate and indoor air quality acceptable to human occupants with intention to minimize the potential for adverse health effects.
ASHRAE 62 recommended minimum Outdoor Air Flow
- Range 15 - 60 cfm per person
- Most common range 15 - 35 cfm per person
- Average range 15 - 20 cfm per person
ASHRAE 62 recommended maximum CO2 Concentration
- Outdoor background level 350 ppm CO2 in the air
- ASHRAE recommend less than 1.000 ppm CO2 in the air
- Human discomfort begins at levels above 800 - 1.000 ppm CO2 in the air
- Long term health effects for concentrations above 12.000 ppm CO2 in the air
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Related Topics
• Ventilation Systems
Design of systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more.
Related Documents
ASHRAE - American Society of Heating, Refrigerating and Air-Conditioning Engineers
ASHRAE Standards.
Discomfort Index
Comfort vs. dry bulb, wet bulb and dew point temperature.
Human Need of Air
Fresh air is required for respiration and for transport of heat and vapor emitted from the human body.
Outdoor Supply Air Rates
Recommended supply air rates of outdoor air - with or without smoking - in rooms like banks, assembly halls, hotels and many more.
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