To reiterate one of the last points re: household refrigerators. I just got one...kinda like an under the counter size. It's a bit small, compressor in the bottom, solid back, soda can rack in the door, etc. small freezer compartment in the top. I chose this unit cause it fit the space. I set it into the space and was thinking that I would insulate the couple of inches on each side of the space to help out. I plugged it in and after a few minutes I felt the sides and they were hot to the touch. The condensing coil has to be in the sides or top between the insulation, if there is any, and the sheet metal. I guess now I'll leave an air space around the sides to help cool the unit. This unit is not going into a boat. I would get one that was designed differently for that.