You don't want people to "consider using the revolving door", you want people to actually use it, "please use the revolving door" (add an arrow indicating which side it is).
Also your opener "swing doors use 8 times the energy" suggests that in some way the door itself directly transforms the energy. I'd go with just the above 5 words and then a para in 12pt (or so) giving details for those who will inevitably wonder why they should change their door usage habits. Depending on your demographic you might want something more like a CTA "Go Green! Use the revolving door".
Also your opener "swing doors use 8 times the energy" suggests that in some way the door itself directly transforms the energy. I'd go with just the above 5 words and then a para in 12pt (or so) giving details for those who will inevitably wonder why they should change their door usage habits. Depending on your demographic you might want something more like a CTA "Go Green! Use the revolving door".