my lounge is 5.6m x 5m, but as it has nucks and crannys everywhere the largest wall i have available is where my settee sits, as others have radiators, fire place and nucks!
that is the only wall i can have it on as i have a wood floor with a cellar (80% filled in) underneath ive had to shove it 6" into a alcove next to the fire place so ive had to move my settee and chair to the other wall and block the front door off lol , there is a 18" cube planted for a fry setup and a 2.5ft setup for a softshell in front of the tank too lol