I am replacing a bank of 6 Carrier 30gt030 chillers in an area that is prone to cotton wood coil fouling. I am considering the 30RAP or the CGAM's. I'm not familiar with microchannel coils used on the 30RAP's or the coils used on the Trane, as far as which would be easier to keep clean from cottonwood. The application is for the remote main switchyard at a steel mill, so there is not condensor water available and installing piping for a remote tower is out of the question as they are located in the middle of a large switchyard. Any info or experience with accesability or cleaning of the coils would be greatly appreciated.