A “21st Century Performance Home,” built in Livermore California by Centex Homes, is demonstrating several innovative energy efficient features that could become part of the American landscape in coming years. As one of these innovations, occupancy sensors from The Watt Stopper ensure that occupants receive hot water as soon as they turn on the faucet. When builder Centex Homes and design firm Davis Energy Group assessed the needs of this “zero e

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