I have a 2017 TX, and furnace is located in the same place as yours. It does distribute heat, some, but putting directional vents on certainly would not hurt anything. We actually hardly ever use that furnace, I put a fan (very quiet) driven electric heater between the front seats, which distributes heat throughout the interior, at least it will into the mid-twenties. Could be in really cold weather, under 20 degrees and colder it might not, but we are rarely, if ever in temps that cold. When its in the 30's the two AC/Heat pumps work quite well too.