There is such a thing. A lot of big farms use them. Don't know how they work though.
I'm a nurse and I tend to think from a human viewpoint:') I also like my comforts. I was sitting here with my cold thinking if I'm gonna dream I might as well dream big and make a sick room in my barn so if I have to spend the night out there I could be comfortable. You know ac/heated. A couch, cable phone and a computer:')