Air volume exchages per hour during flowering stage

A customer has a question or concerns and I hope we can get some opinions on it, thanks.

I was trying to find information of the air volume exchages
an hour during flowering stage

If temps and humidity are in check I believe people have been plenty successful with around once per minute

@ILGM.Zoe the grower needs to move 100% of the air coming every few minutes in to get good CO2 levels. For example, I have 240cfm incoming air via a duct fan and 300cfm out with a 6" exhaust fan. I also have had no problems with mildew or rot.

Suggested is min of once every 3 minutes exchange rate slower or faster is about controlling temps and RH but the 3 minute rule is proven to keep decent co2 rich air

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