Is there any hotel in Oslo with real in-room A/C?

I am a bad sleeper in general and even worse when hot. While I hope we won't need true a/c in Oslo in September, I'd like to know I'm staying somewhere where I can actually sleep. Is there any hotel near Central Train Station that has true a/c in the room that we can control ourselves, not an air ventilation system that they claim to be air conditioning? My husband thanks you for your recommendations!