Sorry to come back to you but the following model is 8000 BTU even if it's called 6K ?
I guess plug & play didn't require adjurent size wize under the sofa ?
By the way i'm not the proud owner of SM 476 ,Steven is ,mine is SM 471!
SV "TO BE NAMED SOON"
Dometic model DTU 6k 230 vac 60 hz 410