Joe pointed out this was mostly pointless, if not counterproductive since an unsigned is so small

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20814 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2300 Get ventilation parameters from (named) file

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20815 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2300 Get ventilation parameters from (named) file

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20816 b5f69653-2bf5-0310-8201-b0dafb8e1405