Yup I agree Charles. We ran the Sheet metal all the way up to the front of the ac and it is curled up the sides as well about 1/4 or 1/8 inch plus it is slanted towards the front of the Casita
so any condisation will drip onto the Sheet metal and run to the front to drain. Plus it catches the drip that was formed by the fan slinging water to the sides. Also it is a inch or more near the side vents to catch any water escaping there.
Looks pretty good too. I will be very happy on my last test run when it works. Right now though we have rain predicted so I have plastic over the front.
I will have to make a second damn with caulk on the right side so that any water dripping there will flow right out the front and not get caught in the front corner of the Casita