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Want a Water-Wise Home? How One San Francisco Family Made a Lasting Change
Jonathan Feldman, an architect, and his wife Lisa Lougee, an interior designer, undertook a comprehensive renovation of their 1911 Edwardian home in San Francisco, driven by a commitment to sustainability and water conservation. The property, situated on a large lot, presented an opportunity to integrate innovative water-saving solutions. The renovation focused on opening up the back of the house with extensive windows, providing easy access to the garden from two levels. The interior design incorporated light oak floors, soft gray paint, and pale blue grass cloth to brighten the home, which is located in a frequently foggy area. The project achieved LEED Platinum certification, reflecting its energy efficiency, material integrity, and advanced water management system.
During a severe drought year in 2017, the family's lush green lawn stood out among their neighbors' browning landscapes. To address potential concerns, they displayed a sign explaining their use of recycled water. This prompted a discussion about the broader water crisis in the Western United States, which has been exacerbated by a persistent three-year drought. Newsha Ajami, a water expert from Lawrence Berkeley Lab, highlights the inefficiency of the current water infrastructure, which is largely outdated and unable to accurately reflect the true cost of water. This undervaluation of water leads to underinvestment in system maintenance and a lack of innovation in water reuse technologies, unlike the solar energy sector.
Feldman, who specializes in designing water-wise homes, implemented a dual system for water management at his residence. Rainwater is collected in large storage tanks, some with up to 40,000-gallon capacity, and used for drip irrigation in the garden. Additionally, a state-of-the-art filtration system recycles gray water from sinks, tubs, showers, and the washing machine. This treated gray water is then channeled through a separate plumbing system to flush toilets and supplement lawn irrigation. The installation of this system required extensive coordination and negotiation with city authorities to ensure compliance with health and safety regulations, particularly concerning the safe containment and reuse of water on their property without contaminating the municipal supply.
The process of implementing the gray water system involved significant challenges and a learning curve for Feldman. He faced a series of discussions and inspections to secure approval for the system, which is more complex than simple rainwater harvesting due to stricter health and safety requirements. Feldman acknowledges that the initial implementation was not without its difficulties, requiring amendments, new filtration devices, and removal of others to perfect the system. He emphasized the importance of continuous monitoring using water-monitoring software to ensure proper functioning, as malfunctions could lead to issues like unpleasant odors or harm to plants. Such systems are deemed more suitable for primary residences where consistent monitoring and use can justify the investment.
Despite the initial hurdles and ongoing maintenance, the family finds the water-wise system to be a worthwhile investment. Lougee notes that the back rooms of their home, particularly the primary bedroom, offer a serene view of the garden, which remains vibrant even during droughts, thanks to the recycled water. She initially had reservations about the cost, but now appreciates the long-term benefits and the ability to maintain their garden's lushness amidst water scarcity. The project serves as a practical demonstration of sustainable living and innovative water management in an urban setting, offering valuable insights into the complexities and rewards of integrating eco-friendly technologies into residential design.
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