Originally posted by ZuzuMonk: 'Inside' Heat shieldMax - 81.0ºMin - 73.4ºAvg - 75.6ºInside the car (1 window open)Max - 78.3º (blazing! )Min - 75.9ºAnd finally, on the other side of the heat shield:118.2ºSo I guess it is working...at least partially...