HVAC installation

So yesterday they installed the bulk of the HVAC (heating, ventilation, and air conditioning) system. We have a furnace (shown by our lovely model, "Vanna")...

Ductwork and vents are now spread throughout the house (these are the two over the breakfast nook/living room).

We have single vents in the two smaller bedrooms, each bathroom, the breakfast nook, and over the front door; we have two vents each in the living room and the master bedroom. We also have this nice jumble of ductwork over the front door (I sure hope nothing is too kinked up in there, because the bulk of our air is flowing through this intersection)!