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Water cooled condensers are nothing new. Yes they certainly work well at first.
1: Hard water deposits on coils hurts long term efficiency
2: Coils must be cleaned more often, few customers want to do this or pay to have it done
3: Water deposits clog sprayer nozzles over time.
This is why we don't ever see them in residential applications although http://freus.com/ is trying to change that
Your right! those were problem we encountered. Our patented water treatment and filtration system has been changed all that which has lead to huge savings for such clients as Hughes Networks, CentryLink, Dal-Tile, Denny's and list goes on. Good luck with the residential market It looks like you product would do good there.