a man standing in front of a car

1-800-Plumber + Air
Tankless Water Heater

Having a
Call or Find Your Nearest Pro!

The zip code you entered is not associated with one of our locations. Please visit our Locations page to find your closest location.

Contact Us

a person standing in the rain

What is a Tankless Water Heater?: A Complete Guide

What is a tankless water heater and how do they compare to more traditional water heaters? According to the Department of Energy, tankless water heaters can save you money on your energy bills compared to water heaters with storage tanks.

In this article, we'll compare a tankless water heater vs tank water heater and show you which one is best for you. We'll also offer you a closer look at the Rinnai tankless water heater installation process that our heating and cooling experts carry out.

Ready to find out more about tankless water heaters? Then keep reading!

What Is a Tankless Water Heater?

Let's start with the fundamentals: what is a tankless water heater? Put simply, a tankless water heater doesn't store hot water in a tank but heats water as you need it. This means that they offer big increases in energy efficiency compared to water heaters with tanks.

When compared with traditional water heaters, tankless heaters tend to cost more initially but offer long-term savings. They also have a long life expectancy of over 20 years.

Their chief disadvantage, when compared to water heaters with tanks, is that they cannot produce as much hot water. If you only have one, small tankless water heater, it may only be able to supply one faucet with hot water at a time.

This means, for instance, that you can't use a dishwasher and have a shower at the same time. This problem can be ameliorated by installing a larger tankless water heater or by having several smaller ones.

Is a Tankless Water Heater For Me?

In this section, we'll offer an FAQ for a tankless water heater. Let's take a closer look and see whether one is for you.

How Much Hot Water Do You Use Per Day?

If you don't use a lot of hot water every day, a tankless water heater can help cut your energy bills while providing you with enough hot water.

Do You Meet the Requirements?

Tankless water heaters should be no more than 50 feet from an energy source. If you use an electric water heater, it needs to be supplied with enough power and a gas unit needs to be vented.

How Much Can You Afford?

As we mentioned, the tankless water heater cost tends to be higher than water heaters with tanks. Yet consider the lowered energy bills and whether you would save more money than you'd spend.

Tankless Water Heater Installation

How will our plumbers go about installing your tankless water heater? If it's a gas heater, we'll need to mount the unit onto your wall and connect water and gas lines as well as installing a flue.

If it's an electric heater, we'll need to mount it and connect it to water and electricity supplies.

Installation is fairly simple but should be done by a professional due to the potential for gas and water leaks and other serious issues.

Ready to Go Tankless?

You began this article with one question "what is a tankless water heater?" We hope that we've helped you understand what they are and how they can help you. For more information about purchasing a unit, getting it installed, and cutting your energy bills, please get in contact with us by calling 1-800-758-6237!

Ready to
Contact Us Now!

Contact Us

Chad was very informative and professional. He and his co-worker are a very rare breed in that they fully prepared to go to work and get the job done right then. I would definitely recommend and use again Chad an 1-800-plumber.

Kenneth C.

As a consumer and customer I am very happy with 1-800-Plumber Air of Pearland. I really appreciate the concern Joe and his helper showed for my issue and for the work they performed. I highly recommend 1-800-Plumber Air of Pearland


1-800-Plumber fixed burst water pipe in my home. Hector and Chad explained the issue well, communicated timelines and completed work with an affordable price tag. I recommend their services.

Bhavna P.

Great service. Professional. Let everything nice and clean. Consistent experience.

Sonya W.

So nice and professional.

Sharen B.

I was very impressed with Nick and that he was very professional. This was the first time we had used 1-800 Plumber and it wont be the last. Nick went above and beyond. read less

Satisfied Customer

Fine young man and as far as I am concerned he can be his permanent tech. He was very polite and he was very pleased with him and will be calling us again to work with Manolo. Manolo needs a pat on the back and he did a good job.

Satisfied Customer

Tony and Carlos are awesome in what they do. They did a great job on about 20 different projects for my family and me. They did security lights patio lights front porch lights. Ran all the electrical for our new master bath remodel. Added on some new interior lights and changed out some switches. I have light where there once was darkness. Thanks guys.

Satisfied Customer

My daughter Natalie Permenter actually ordered the service. I'm at her house during the day to keep my grandson. I was very impressed by Emanuel, the plumber that cam. He was very professional and seemed to really care about his clients. Natalie tells me the lady in the office also showed professionalism and a genuine desire to help. Emanuel was disappointed that he couldn't get the job done on day one; but promised to come back the next day. True to his word he was here bright and early. I am so impressed to finally find a company that really cares about the consumer; not just the dollar.

Judi W.

He was everything you want in a employee!!! He was professional, kind, informative, patient, and very clean.

Ann B.

Availability icon



costs at the end of a job icon

No surprise

costs at the end of a job

Committed to on-time arrivals icon


Committed to on-time arrivals

Find Your Home Town

Call 24/7

Want To Connect With
Call or contact us now!

Contact Us