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How Does a Tankless Water Heater Work?

Posted: December 9, 2019

Tankless water heater

When most people think of a water heater, they think of that big metal cylinder that takes up a corner of the basement.

But it doesn’t have to be: a propane tankless water heater, for example, is about the size of a small suitcase. It can even be mounted to the wall.

But that’s not the best part about choosing a tankless water heater: you’ll also get virtually unlimited hot water, and spend less on energy for the privilege.

The question is, how does a tankless water heater manage all of this?

How a tankless water heater works

Mostly, a tankless water heater achieves its advantages by taking a completely different tack to heating water for your taps and appliances: rather than storing hot water for future use, a tankless water heater heats water instantly, on-demand.

Here’s how it works.

Tankless water heaters are extremely efficient for two reasons: first, they never have to reheat water (as a water heater with a tank does after its water has been sitting for a while). Tankless water heaters also use electronic ignitions rather than a constantly -running pilot light.

All in all, tankless water heaters can cut energy consumption by 30 percent or more while providing a limitless supply of hot water. They also last almost twice as long as a conventional water heater – almost 20 years on average, compared to 12 for storage-type systems.

Want to see a tankless water heater in action? Visit our new Kinston, NC showroom at 2213 Hull Road for a demo! And don’t forget to ask us about Rinnai rebates that can help you save up to $150 on a new water heater installation.

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