Mr. David Gunning:

The next big piece of work is commissioning all the systems. You get the rooms ready, but then a big thing in a hospital is ventilation systems. That is why the grilles in the operating theatres are so crucial. Infection control in hospital is all around air changes in the rooms and taking the stale hour out a number of times per hour or per minute. That is different depending on the acuity or particular function of a particular room.