It is a functioning garage converted for exclusive use for aquarium(No more cars or storage). I will keep the garage door and install insulation around the inside of door when heat gets up. I have installed 2 100cfm bathroom vent fans directly over the tank that will be controlled by a humidistat on the APEX. I have also had inline fans installed over the garage area in the attic. Walls and ceiling have been ultra insulated. A ductless AC system is being installed for the garage as well for constant room temp and the chiller/heater will not have to work nearly as much with this scenario I am hoping. And yes summers here will stay around 100F for what seems forever so heat is a major concern with the build. We shall see but I am expecting around 5-7 gpd evaporation.I am new to this forum. Kudos to a well thought out design. The tank is incredible, as is your tenacity for perfection. I have a question about the room the tanks are housed. Is this a functioning garage?. It looks like you life in the DFW area which is smothering HOT in the summer. How will you keep the room stable for tank temperature, or are you relying on the chiller/heater?