I'm needing advice and ideas for my RODI system and mixing tanks. I have my DT on the main floor built into the wall between a bedroom closet and the LR. I have no room in the closet once I place my small utility sink in there. Plus the weight of two 25 gal tanks would be weight prohibitive to mount up on the wall (even if I could place the supports in studs). My idea was to place the RODI and the tanks in the attic space above and run the post mixing tank line down through the floor/ceiling into the closet with a cut off valve and dispense when needed. Winter time is no problem as heating the water is easy. But what about summer when the temps in the attic are in the 80's? Since the DT will be around 77 to 78 degrees, will this temp difference be too substantial for a water change? Addendum: I'm also putting a full hood over the tank.