Although the the HUMMER I had in the Army didn't have AC, I rana hosefrom the heater duct in the front to the back in order to keepthe rear riders warm. Well..... Thatwas unless theycomplained too much then I'd stick a scarf in the hose so they'dhave something other than my drivingto complain about. Guess that hose would work on acivilian HUMMER's AC

 

I wasn't trying to be funny. The vents pointing upwards works.