On my low-profile boat, it is impossible to have an enclosed, stand-up engine room. The boat's engine compartment is accessed from hatches in the pilothouse floor, on both sides of the engine as well as directly above. There are battery boxes on both sides so one can usually sit while servicing the engine, electrical, fuel-line, air and water-line components. One can stand up, but one's head and chest will be in the pilothouse. Thankfully, there is little need to put body weight on the knees.