Edge Frontal Area

Hi,

In my other thread the question of trailer frontal area came up and based on my simple WxH calculations the Edge would be too large. However, my research indicates that the actual frontal area should not include the area from the road to the bottom of the trailer body, and the listed height also probably includes the air conditioner, which contributes less frontal area than my basic calculations would assume.

So my question is: What is the actual frontal area of an Edge trailer (I'm most interested in the M18, but I'm guessing they're all about the same)?

Thanks.