I had a nuc (slip that I did in sept) in my garage, Box of MDF of of 5 frames. My cover was screen and I had a rubber pipe going outside hook at the bottom. ( I will try to post a picture) It work perfectly Im in canada and this winter it was very cold. They were in my garage at 5 degrees canadian. My other 2 hives died in the last month (march) I don t know why, those one were outside I check them on March 7th they were ok and on March 28 th they were dead in a corner. Next year I will put more in my garage.