The classic sick building syndrome, in my understanding, described a building ( usually an office block) with poor ventilation and maybe cheap air conditioning, which meant that there was not enough fresh air in the building for the number of people.
For a domestic home, I think that good ventilation is vital. Dont know how you measure this, but I am interested in knowing, as I need to improve the ventilation in my home.
Also, the only healthy thing about wooden floors, is that dust does not get trapped in them. People with asthma and related condtions, find wooden floors easier to keep dust free.