Vision Mechanical Ltd recently installed three Rinnai Demand Duo®s at the University of British Columbia's Okanagan North Campus. The Rinnai units replaced two traditional tank water heaters that were only four years old. According to Brent Watson of Vision Mechanical, "You have a tankless hot water heater built onto a holding tank. The benefit of that is that the burners are not located inside the actual tank itself. They're on the outside, and there's two of them. So, if one goes down, you hav