Inlet and outlet ventilation case
 

I have a model, that i have as an enclosed room, however i need to introduce an inlet and outlet, now i know that i have to use blockMesh to do that. But which solver i should use and which tutorial explains this. I need to introduce ventilation in my model using a window or an inlet. I have seen pimpleFOAM in tutorials however that does not have inlet and outlet in the blockMesh files.