As a sanity check I looked at it from the standpoint of a 2400-calorie diet of 100% carbs (glucose) and it works out to around 32 grams per hour of CO2, which a

As a sanity check I looked at it from the standpoint of a 2400-calorie diet of 100% carbs (glucose) and it works out to around 32 grams per hour of CO2, which agrees with a figure of around 1000 liters per minute to dilute it down to 400 ppm over ambient.