I am care to compare all the different Standard or Codes or Rules for European Hospital buildings (inside rooms) and mainly for Operating Theatres and dangerous Areas (infected, etc.).
Could you give me your local country reference or link to standards?

CSSD's in this country work to the Australian Standard 4187, "Cleaning, disinfecting and sterilizing reusable instruments and equipment, and maintenance of associated environments in health care facilities".
Take a look on the internet and you should be able to track down a copy.