Replacing coleman ac with vented sunroof?

Thanks for the input. Been looking into the fantastic fan, and the Maxxair. I've heard the Maxxair is qieter, so I was leaning that direction so far. I Live in my trailer, so not too worried abour re-sale, But planned on keeping the coleman and not doing any permanent mods just in case. I mainly hope to ger a little more light in, and fresh air. Thanks again!
Tim

As for the heat here, I have a Much better unit cooling the trailer. Just playing with the idea for now, seeing if anyone has had any experience with this.