Not sure why you're downvoted. But in general that's probably the attitude. Can't say if it is just cheaper, but it is more efficient. It has a high boiling po

Not sure why you're downvoted. But in general that's probably the attitude. Can't say if it is just cheaper, but it is more efficient. It has a high boiling point, so you don't need as high of a pressure. That means can design the installation with less tolerances, not as powerful of a compressor etc. Moreover if you already have setup that works, you don't have to spend money to retrofit it.