Depending on how far the existing chimney footing sits in the ground and where the flu exits the building, you may need to dig a well and put in some drainage (crushed stone) ... but likely not.

I know an investor here who has over 60 properties and never heard of such a thing.You might want to think about changing your virus software, locks, and whatever else they took pictures of.

Her husband is paralyzed after a flu shot last year and they need to move back to Washington by Aug 5th.

In these instances force-air heat is about the worst with which to deal:1) Common ductwork allows air to circulate between the units - this includes smoke, cooking odours, airborne viruses, etc.  

Always makes me wonder if it's a virus. 

Larry T,When I lived and renovated houses in the Denver Metro area, my crew would get the Ski Flu when we had a good snow fall in the mountains. 

Even in Dallas I doubt anyone's going to be selling their houses and packing up any time soon, the speculation of imminent terror is much more severe than the virus itself, in the US at least.

That flu pipe could use some straps don't need that coming loose.

It also gets rid of formaldehyde, bacteria, viruses and even VOC's. 

For example this house has two fireplaces if there's something wrong with the flu flute??