IHi, I ha e a 2003 B36 2 cabin with a 4 outlet heater, 1st outlet is in the heads opposite toilet bowl, second outlet is in the aft cabin below berth facing the door with a T off to 3rd outlet running round fron of engine to below the bottom step the 4th outlet runs all the way down the port side and is terminated with an outlet below the sea on the port side in the forward cabin. The heater is mounted behind the aft cabin bulkhead in the void space in the transom with the outlet on the port side above the engine exhaust outlet, the ducting passes by the water tank with plenty of free space, hope this helps, David Dawn Magic B36/2