Heat Water on the Stove/ In the Microwave
Then, you won't waste water while you wait for the tap to get hot.
Install a Point-of-Use Hot Water Heater
If you regularly need hot water for pots, dishwashing and hot drinks, consider installing a point-of-use hot water heater (also known as an instant hot water system) under the kitchen sink. It’ll supply you with hot water as soon as you turn on the tap, and only costs a couple hundred dollars.
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