How much air flow should I be getting out of the air vents on the left and right side of my dash. The ones that are closest to the doors. With my heater on, my center dash vent blast out a great air flow but the side vents produce very little air flow. This is with the heater set for the dash vents and yes all my vents are open. Should I be getting the same air flow as the center vents? I only feel a small air flow coming out of the side vents, it's almost not detectable.