I as just talking with my sis-in-law who is building an indoor pool. She told the builder that she wanted a humidity control system for the pool. I guess he misunderstood and quoted her for a heat pump, as he has never built an indoor pool before. Now they are installing the humidity control system ($35k!). Anyone have any ideas as to this kind of price tag? Apparently it is similar to the ones installed at hotels. She was told that there are not too many choices as to the system so there is not much shopping around to do.