Dear experts, pardon me if this question seems childish but want to confirm it: Whenever I drive my Altis 1.6 on road, after the car achieves certain speed, I begin feeling air coming from air vents, though AC/Heater remains switched off. Sometimes, when I open the heater, the interior cabin becomes hot, then after I close it, I can still feel hot air coming from air vents for some time? Is it normal? How should we avoid feeling air coming from air vents inside cabin, when AC/heater is switched off? Merely by closing the air vents manually? Thanks and regards.