Are Drain Water Heat Recovery Systems Worth It? portion of the energy use in domestic water heating is lost to the drainage channels. Channel by applications such as showers, baths, dishwashers, and so on. It has been demonstrating that recovering waste heat from domestic wastewater flow is a sustainable method of increasing and building energy efficiency. Water heating accounts for up to 20% of total home energy consumption, ranking second only to space heating in terms of energy consumption. Drain Water Heat Recovery (DWHR) systems are an energy-saving technology that can reduce the energy consumption of your water heater by up to 25%.A large
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