No, I believe E is for Sophomores this year. As for AC, I don’t think E complex has AC for every room.
Hirai Hall is a part of E-Complex and singles in Hirai are big and close to academic buildings. I believe it was Sophomore housing though. You can email Reslife about it and ask if there’s a mistake. I you end up living in E, you can go to Sage Dining Hall for food, which is about only 5 minutes walk from E.
There is an AC in E complex. Kitchens and laundry you can look on floor plans of E COMP -> http://www.rpi.edu/dept/res-life/html/floorplans-ecomplex.html
There’s one shower per bathroom in E Complex.
The closest dorms would be E-Complex or North. That being said it would be about 2 minutes closer than all other freshman dorms.
North is for freshmen. E-complex is for upperclassmen.
E-Complex does have a laundry room in its basement. Like all laundry on campus, it is free for student use.