I personally keep it at my bedroom. I've got a small mining rig of 4 msi gtx 1060 cards which are sitting on the other side to my bed.
They just have two fans and don't make much noise. They've been a few months with me so I don't mind them any more.

Since winter is coming I don't get bothered with them and even in the summer just a fan was enough for me since I live in a tower and leave windows open for most of the time.

I really can't figure anywhere else. That's the only place I have since there's no garage and balcony isn't safe from rain.