The previous owner did what!
When I bought my house, I asked the realtor about heat in the kitchen. He said it was radiant floor heat. I went down stairs to see the piping. The hot water copper pipes just ran along the joists (U configuation)and then exited the room. This is at the end of a single level ranch, with windows on 3 sides.
I can't believe they thought that was sufficient heat!
I have since put in 15' of baseboard. Should be toasty.