A Look at the Main Parts of a Tankless Water Heater

Tankless water heaters, also called on-demand water heaters, can help you save energy and money by heating only the amount of water you need, and only when you need it. Tankless water heaters also provide the added benefit of instantaneous and unlimited hot water, so you never need to worry about running out of hot water after taking a hot shower or doing the laundry. Here’s a quick look at the main parts inside a tankless water heater. Contact a water heater installation company in Fremont to learn more.

tankless water heater san jose Heat Exchanger

The secret behind a tankless water heater is a powerful copper heat exchanger, a device that transfers heat from one source to another. In the case of a tankless water heater, the heat exchanger inside the unit transfers heat generated by either electric coils or a gas-fired burner.

Temperature Sensor

The temperature sensor, or thermostat, works in conjunction with the water-control valve to ensure that the water leaving the unit is at the temperature being requested. You can also adjust the temperature sensor to dial-in your preferred hot water temperature.

Cold-Water Bypass

Speaking of hot water, sometimes the water inside a tankless water heater can be much hotter than it needs to be. The cold-water bypass introduces cold water to the hot water, bringing the temperature down to the set-point temperature controlled by the thermostat on the front of the unit.

Printed Circuit Board

The PCB is the brain of the unit, monitoring the flame rod, fan-motor frequency, outlet water temperature, set-point temperature, and water-flow rate. The PCB also monitors all components and fires the unit as needed to prevent water from freezing inside the unit, which can be an issue with outdoor models or units installed in unheated areas inside.

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