I wish I had that much control of my temp/hum. I'm growing in a 4x8 tent with 2000 watts HPS lights with 8" vented hoods and a 6" filtered exhaust fan pulling air from the outside through the grow room. My temps have been 75-78 F with the lights on and 50% humidity.
But when the lights turn off I'm getting minimum temps of 58 F and humidity of around 40%. There was a couple of days that the humidity went as low as 15% but it's usually around 40%. This is day 3 of flowering. Any suggestions of how to create tighter control of the temp/hum in such a small space? Putting in a humidifier, dehumidifier or heater seems like it would be a mute exercise as the heat would build up with the exhaust off and if I kept the exhaust fan on wouldn't it pull the treated air out of the grow space? Any suggestions would be greatly appreciated.