it is a galvanized cabinet, i am new to these kone cars, and all the different names get confusing. there is a manual on the job that says kcm831 resolve, I asked the mechanic on the job, and he says the print says eco space. there was a sticker on the inside of the cabinet that just said kcm831. what are the differences in all these controllers. we have tmsav50 units that say eco space also on the print, any insight would be appreciated.