Here's the little room heater, that the owners bought after we arrived, after which we were quite warm. The doors behind it go directly outdoors to the hot tub, which in the summer would be a big benefit. However, cold air was sweeping in here till Jay put painter's tape up around the door (He even fixes OTHER people's houses!!). It made an amazing difference. He did miss a spot, though. On Sunday morning, when it was about 6 degrees out, there was a little strip of frosted ice on the inside of the middle stripping, where there was still cold air creeping in.