Press release for architects, engineers, surveyors and designers who do not number the rooms from the beginning of the design. The numbering of the rooms, as well as a convention for fire prevention, is also a way to facilitate the design and construction work without creating logistical issues and delivery errors. It is different to say “there is a problem in the third right of the second floor” and “there is a problem in the 27”. It often happens that a guest exits the elevator and looks for their room on a table with 3 or 4 rows, saying that the rooms from 10 to 13 are on the left, rooms from 17 to 19 are on the right, and rooms from 14 to 16 are again on the left. If there were only two rows of numbers it would be much easier and smoother: those rooms are on the left and these are on the right. For this and other reasons, the numbering of the rooms must be given immediately in the design phase and must start from the exit of the elevator or from the arrival of the stairs and possibly go clockwise. Of course, it is not a mandatory rule, and the owner can give the numbering they wants to their hotel, or they can call the rooms with proper nouns, explaining to the guest that the PRIMULA room is located on the second floor on the right and is the third on the left. In the event of a fire, a firefighter who has to enter room 35 from the outside or from a smoke-filled corridor is unable to read the number plate, could locate a room and perhaps save a person’s life.