I do believe I saw a gutter system in the buildings. I could be wrong. I will look again. I think I saw gutters on pictures they showed us today. HVAC and air filtration would have had to have been there for HC. I know where you are going with this any1. I agree it would be nice to know more about what is inside the building versus guessing. I tried calling IR today a few times with no luck. I will get him on the phone tomorrow and try to get some answers to these type of questions