[EN 12792:2003, 354]:difference in air temperature measured at 1,1 m and 0,1 m above the floor. The distances 1,1 m and 0,1 m are theoretical average values for head and ankle height of a sedentary persontemperature differential, extract[EN 12792-2003, 147]:algebraic difference between the extract air temperature and the mean measured air temperature of the occupied zone.