Why Does My Air Conditioning Unit Increase CO2 Levels?

increased levels of CO2 from air conditioning

Can anyone explain why a newly installed air conditioning unit would increase CO2 levels in my home? Here is a chart produced by Foobot which measures indoor air quality factors.  It shows a rapid increase in CO2 when the air conditioning unit is turned on and then a decrease when it is turned off.   Please answer or respond via email. 

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