CO2 Levels in Winter

WannaBeeGrow

WannaBeeGrow

Active Member
In winter the ambient CO2 levels outdoors rise being highest in winter.. Venting air from outside into my grow makes a difference. This creates positive pressure which is contrary to all information I am aware of to date.. Negative pressure for a lower VPD? I need advice on CO2 real time reading devices that anyone might point me toward.
 
WannaBeeGrow said:
In winter the ambient CO2 levels outdoors rise being highest in winter.. Venting air from outside into my grow makes a difference. This creates positive pressure which is contrary to all information I am aware of to date.. Negative pressure for a lower VPD? I need advice on CO2 real time reading devices that anyone might point me toward.
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I use the SCD-41 (https://www.adafruit.com/product/5190). It's quite accurate.
 
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