Hello guys. I am just wondering if ventilation is necessary for a plant growth chamber with control system. We are going to control the co2 concentration, humidity, and temperature in the plant growth chamber. We are also to measure to the rate of photosynthesis by measuring the carbon dioxide uptake of plants. We are just worrying if ventilation is needed in the growth chamber because we want it to be completely sealed so that data gathering will be accurate and leakage will not be an issue. Thoughts on this guys? Badly need help