The green grate is a tomato cage for the scrog, it is in an attempt to keep the canopy organized. The white bar is actually just a curtain rod I had used for positioning a fan and have a few buds that are tied to it since they are getting to heavy for the stems to hold them up.
And yes, cooltube and 6" ducting connecting my carbon filter to the fan that is pulling hot air from the top and venting it into my garage. It really only spells when I open the door and lose the negative pressure, I have some Ona gel to help when I open the door but it is really fighting a loosing battle
She is a smelly one right now. Heat is still a concern though, I gain about 10F from ambient and this is my office built in the garage. Not sure if I can maintain temps for my next grow over the next couple months without firing up the AC, but I have a portable one that sits a couple feet from the intake if I need to.