Two Valencian plumbers have designed SmartWater, a water device that can save about 500 euros a year to a family and up to 4,500 euros to a hotel. The system halves the cost of water, 20% of energy and 30% of CO2 emissions in any daily action that consumes hot water such as showering, washing hands or washing dishes, a gesture that can be almost continuous in professional facilities such as hotel establishments, campsites, hairdressers and gyms.

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