Plastic fumes are something you don't want to mess around with long term exposure is not good for you. I don't think what your looking at is going to do you any good for the plastic. I pour plastic and lead with mine and the worst problem with my set up is it pulls the air out of my shop which leads me to my point of you going to need make up air for what you're pulling out of the room . I'm not trying to rain on your parade I just want to see you or your family hurt