On Friday, August 22, 2014 1:08:47 PM UTC-7, G=EMC^2TreBert wrote:
Checking out major hotels air ducks and they are killers. Cirus Circus #1 Ceasors #2 Need duck cleaning badly,and my mold and mildew filter.Very big jobs but its a must. TreBert


Wasn't the famous Legionnaire's disease spread through ducts?

Double-A