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The Best Tankless Water Heaters for 2019 | Reviews.com

Tankless water heaters supply hot water to your pipes every time you turn on a faucet or start a load of laundry. The more powerful the water heater is, the quicker it can heat and supply. Because they produce hot water on demand, it’s critical to choose one that’s sized accordingly. This is where the gallons per minute (GPM) measurement ...