I just installed a tube into the bottom of the cabinent for air to flow into and was wondering if it will go in on its own or if i should be having a fan put somewhere inside/outside ..

What is everyones input on this, I have another tube like this one if i should be putting 2 of them in.

As you can see I have hinged a new door on aswell. Its not fully light proof but Im doing this one step at a time

ANY comments would be appreciated Thanks