I went with the ADA71. It is to replace the one I currently have on the roof. It is ducted like a piggyback system with the furnace/ac unit. I'm running around 1900 sq/ft. I was looking at the smaller of the three that were at Home Depot since last fall. But with that 20% discount, and the fact Home Depot doesn't have them in stock, and will drop ship it. It is all the same.
I need to figure out how to get that damn thing on the roof. I still have a herniated disk. lol
Single Inlet Coolers, Down Discharge by MASTER COOL - Evaporative Coolers at Zoro
Maybe I should have pony'ed up the extra money for the ADA7112!?