any one know why the heat that comes to the floor would be cooler than if i put it on upper area of the cab?

 

i dont know cold sinks and heat rises so i bet thats why

 

could be takin in from outside air.. hence the cooler temp.. i think mine is set if you have the heat on the floor its not the recirc. air it is outside air.. the othr thing.. seems mine.. anytime you have it on the top two fan speeds its always cooler.. i put it on low or med low and it works like it should