Impact of Indoor Carbon Dioxide Levels on Human Health and Its Restraining Methods:A Literature Review
The level of indoor carbon dioxide(CO2)in buildings is an important indicator of indoor air quality(IAQ).CO2 concentration levels are commonly used to evaluate indoor ventilation efficiency and occupant density.It is also an important parameter for HVAC ventilation,and maintaining appropriate levels can ensure normal rest,comfort,and efficient work for occupants.However,the effects of CO2 on the human body vary among different situations.Even with CO2 concentrations and exposure times below the standard limits,there can still be discomfort symptoms for occupants.Thus,there are limitations in applying existing regulations and standards of CO2 concentration to designs of air conditioning and ventilation system.A literature review was conducted on the effects of CO2 concentration,exposure duration,and creation methods on human health,comfort,and work efficiency.The impact of CO2 on the human body in different scenarios was concluded and suggestions for future research work were proposed,providing references for designs of air conditioning and ventilation in buildings with different functional areas.
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