A utility vehicle is described having front and rear passenger area, and an HVAC system provides treated air to both front and rear areas. The front area includes a tunnel extending longitudinally rearwardly, and a low profile duct extends within the tunnel to communicate treated air to the rear passenger area. The frame has been modified to mount a drive shaft carrier bearing to maximize the arear under the tunnel for hose routing. The frame has been modified to maximize the ingress area for the foot of the rear passenger. The frame has been modified to better seal the vehicle when doors are utilized.