I'm about week 3 into my grow and I'm starting to run into some humidity issues. My room is mostly sealed - the door to the large grow room area is almost always taped off to prevent light from escaping (the first weatherstripping job didn't quite seal all the cracks, will revisit later). The room is connected through two closets, with another entrance through the larger closet. This door is NOT weathersealed, but will be once I add a ventilation hole. The question is, where? The room this second door goes into is the only room in the house where I smoke so I really don't want that room to be the primary source of fresh air. Should I just run a duct from another part of the house to empty fresh, cool air into the outer closet? How should I ventilate the sealed grow chamber in the center to maintain the same environment as the other rooms, but without letting light escape? Notes about the diagram: The lights are shown in white - one 1000W MH/HPS light over the main grow area, and CFL tubes in a light sealed grow chamber in the upper half of the small closet. The grow areas below are show in green. I have a 720 CFM 8" fan w/carbon filter providing exhaust ventilation, and a 6" in-duct fan that pulls air from outside, through the MH/HPS light, and back out of the room (separate ducting). The in-duct fan runs on the timer with the lights, the 8" fan is run on a thermostat set around 79F with the temp probe at the table. There is an electric heat source controlled by thermostat, set to maintain the temp at 79F. There is a ceiling fan and floor fan (both always on) to circulate the air. Any recommendations for this room would be much appreciated! Everything was nice and stable until I hit week 2 and they started sucking up major H2O!! Humidity has been difficult to keep down - I usually open the closet door about 1/4 of the way to vent or kick on the 8" fan for a few minutes and that works for the most part but I need to get it stable. Do I need a dehumidifer?? HELP!!
If your fan can stabilize the room when you turn it on but it's to much to leave on I'm guessing get a timer and have it on every other interval to kick on and off 24 hrs a day in 15 min intervals Is the humidity affecting your plants or what IMO if your plants look good then don't worry Good way to measure humidity is half your temp and that's ruffly your goal humidity Sent from iPhone 5
The exhaust fan is on a temperature controller and can pull all of the humidity out very rapidly, but I don't think this is what I want - I think I'd basically just be working the fan much harder than it has too and causing the humidity to fluctuate where i want to keep it fairly stable. I think chilling my water might help but it could be a few weeks before I get anything built so I'm starting to drop bottles of ice in to keep the temp down. The room has really good negative pressure / it's sealed pretty well, I really think it just needs an intake vent, I just don't know where to pull the air from. I think I'm looking at running a duct either through the floor or the attic to allow air to be sucked in from another part of the house.
