Need help cooling sealed room

I've recently moved and my new grow room does not have any windows. There are zero options for fresh air and thus heat management. Originally I figured i would just Get a portable Ac unit and that would be the end of it, however, it looks like portable Ac's need somewhere to exhaust hot air generated in their cooling process. My question is this, do they make any portable AC units that dont require any exhaust? Or, is there any other way to cool a small room running a 430W HPS? I have an air cooled hood, but without any exhaust options...whats the point???

You're going to have to exhaust the hot air somewhere. Even if it means cutting a hole in the wall, or door, you can't really get around it. How are you getting fresh air in, if the room is sealed? They have to have fresh air as well.

Yep you gotta have a place for fresh air to come in and hot air out. no if ands or but's about it. good luck