Down the Drain

Equal flow (option 1, left): Preheated cold water feeds both the water heater and the cold water supply line to the plumbing fixtures. Unequal flow (option 2, right): Preheated cold water feeds the water heater only.

Designed by JSWD Architects, the Green Gulch Farm dormitory at the San Francisco Zen Center in Marin, Calif., captures graywater heat from the second-story showers through a drain water heat recovery unit.

Second floor, Green Gulch Farm dormitory by JSWD Architects

Join the Discussion

Please read our Content Guidelines before posting

Close X