I have a cheap grow tent 4x4x6.5. I wanted to add exhaust ventilation but there wasn't a vent hole on the side of the tent where I wanted the ducting to exit. ENTER Secret Jardin. The have all the gadgets to create a vent hole anywhere. I picked the model that attaches to the grow tent posts. This type can go into ANY corner of your tent. There is a great installation video on YouTube that spells out the process. Well worth checking that video to see if these products can solve an issue with your tent setup