Defroster vents

There are six defroster vents, two for the windshield, two for the front side windows and two for the rear side windows. The two for the windshield are designed so that the majority of the air is directed up against the windshield. The remaining air trickles out at the bottom edge of the windshield to help keep the windshield wipers free of ice.

The air ducts to the front side window defrosters are a continuation of the windshield ducts.

The air ducts to the rear side windows go via the floor to the B posts. The air ducts are a continuation of the windshield ducts.

The defroster vents in the B posts can be adjusted by the rear seat passengers.

The seven seat XC90 has two additional defroster vents, one in each C post. The air to the two additional defroster vents comes from the XC90s rear climate control.