Just a few pictures of my in progress, grow room project. I've been playing with the exhaust, CO2, air conditioning, light placement, ventilation, and fans to get everything just right. Another air conditioner may have to be added when the final 3 lights (2K in flower and 1K in veg) are turned on. At the moment, the ambient temperature is set to a max of 84F with the lights on and the humidity floats between 45 and 58 percent. The CO2 was floating between 1400 and 1540 ppm when the temperature was 10 degrees cooler outside last week. Summer is here and it's beginning to warm up. My room temperature is affected even though I run the majority of my lights when it is dark outside. Now my CO2 is floating between 1150 and 1300 ppm because of my max temp cutoff setting.