First Choice A321's

On the 27th of Feb im flying to Turin with First choice, i have reserved my seat with extra legroom, and i asked the man on the other end of the phone which type of aircraft was on that route…and he replied a A321 (full trip account to follow in 2 weeks time)…but the last time i flew on an A321 by the front exit, there was hissing noises coming from the door and you could see water droplets forming round the seals…now on the likes of B757 aircraft the door swings into the cabin and closes, and pressurisation keeps the thing closed, but on the A321 plane…the door swings in from the Right and latches to a secure position, does it rely on Pressurisation to keep the thing closed or the bolts when cabin crew swing the lever across….im not normally a nervous passenger,but my last experiance on an A321 left me slighly more aware of Noises that happen around a plane door!