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A normal Hot Water Heater accounts for 20-30% of your households yearly energy costs. Imagine a contraption the dimensions of your kitchen cabinet, heating your house and giving you a never-ending supply of drinkable hot water. Unlike "conventional" tank water heaters, tankless water heaters heat water only as it is used, or "on demand". Opening a hot water faucet ignites the tough burners and the PC monitors the water temperature and adjusts the burners according to the requirement. High demand, high heat. Low demand, low heat.
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