I have a 13,500 BTU Coleman RV airconditioner on the custom built hard top on the flying bridge which is composed of eisinglass enclosures on all sides, and a shower curtain to the sundeck below. In 92 degree weather the flying bridge goes to 106 without the R V AC, but with the AC it is a reasonably confortable 85 with lower humidity and the cold air blows on my back at the helm seat, even in full Florida Sun. The condensate drain is plumbed along the top of the hard top, along the forward edge of the radar arch and just able a scupper drain with 3/8 vinly tubing. There are no problems with this installation. Bob Austin Symbol 42 Pensacola, FL