Pic 1 is a pic of the outlet vent, it is the same vent as my a/c so the air runs through a filter before it goes to the rest of the house and it also keeps fresh air in the room since it is a closet. You can also see the green light that I installed so I can work on my plant during the 6 hours of darkness if need be.
Pic 2 is a pic of my grow station as I call it. It is where I keep all my shit that I need for upkeep of my DWC.
Pic 3 is my inlet vent. It takes air from downstairs and brings it upstairs into my closet. It also has a filter on it though unlike the outlet it won't have a carbon filter on it eventually when I start to flower. If you look in the pictures above this replay you can see I have one of the sides of the hoob placed up. This is the vent that blows in that direction so every time the a/c is on I have a steady airflow over my plant.