Sustainable Plumbing in a “Not-Yet” Passive House
Graham and Alisha Irwin recently purchased a run-down “Tuscan ruin” in Fairfax. It will eventually be rehabbed into a Passive House, but right now they aiming just for “house.” Accordingly, they are thinking both short and long term in the process. While the shell is a long way from Passive House, the plumbing system has been designed to be maximally efficient, with structured plumbing with on-demand hot water recirculation and drainwater heat recovery. It is also graywater and indoor rainwater harvesting ready. See how simple design modifications can yield big improvements in performance, comfort, energy and water efficiency.