I live in the southern part of the US and it gets like a sauna down here in the 9 mths of the year we call summer (had the a/c in my car on today!!!) and I really need one if not two of these in our new 20 x 20 h/t. We have A/c but these really help out and with all of the equipment giving off heat etc... So, my question is, Does any one have any major reason (s) why I should not use these? Of course, I am monitoring the line of site for the p/j and details like that. BTW-I have 8 ft ceilings in this room and I plan to get some fans that mount as close as possible to avoid problems. PLMK-Thanks!