Heating with thin flexible tubes?

I live in a very large house (30 college students) and the boiler just broke , resulting in a 60 thousand dollar replacement. I once read about a system that eliminates radiators and heats through thin flexible pipes that you install through the walls. In each room there is a tiny hole where the heat comes out. It is supposedly very effective. I'm looking for any information about it because I can't even find a website about it. Thanks