Are tankless water heaters more energy-efficient than traditional water heaters?

• <div><p>According to the <a href="https://www.energy.gov/energysaver/tankless-or-demand-type-water-heaters">U.S. Department of Energy</a>, tankless water heaters are anywhere from 8% to 34% more efficient than regular water heaters. Exactly how much energy you’ll save depends on your household’s water usage. When you purchase a tankless water heater, you’ll also likely upgrade to more efficient technology than your current water heater, which can add to energy savings.</p></div>

How long does it take to replace a water heater?

• <div><p>The time it takes to replace a water heater depends on the complexity of the job. Expect your contractor to spend:</p><ul><li><p>One to three hours on a standard tank-style water heater replacement</p></li><li><p>Two to three hours on a tankless water heater replacement</p></li><li><p>Four to six hours replacing a tank-style water heater with a tankless water heater</p></li><li><p>One hour for each additional parallel or point-of-use water heater</p></li></ul><p>Your project will take longer if you’re switching fuel sources, upgrading to tankless, or relocating your water heater.</p></div>

How long does it usually take to install a water heater?

• <div><p>It usually takes a professional water heater installer between <b>two and three hours</b> to remove an existing water heater and install a new tank heater. However, it could take <b>four to five hours</b> if they have to work in a small utility closet or another tight area, like a crawl space. <a href="https://www.angi.com/articles/what-are-pros-and-cons-tankless-water-heaters.htm">Tankless water heaters</a> have a more complicated installation process, so they will take a bit longer. Additionally, a gas water heater requires a connection to a gas line, and that alone can add about an hour to the installation timeline compared to installing an electric water heater.</p></div>

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Q: Are hot water heater expansion tanks necessary?

• <div><p>While many older homes don&rsquo;t need hot water heater expansion tanks, they&rsquo;re necessary in most newer homes and are required by building codes. These tanks are required by code in areas where there are backflow preventers or pressure regulators on the incoming water pipe between the public water pipes and the water heater. However, tankless water heaters don&rsquo;t require expansion tanks.</p></div>

Q: What are some common issues with a water heater?

• <div><p>Often, the first issue you might encounter is a lack or loss of power&mdash;this could be caused by a tripped switch or a failed heating element. If your hot water is not producing enough power and its size is not the issue, you might need to replace one of its heating elements. A leaking water heater could be caused by tank erosion. </p></div>

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Verified Reviews for Water Heater Service pros in Oran, MO

*The Angi rating for Water Heater Service companies in Oran, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

*The HomeAdvisor rating for Water Heater Service companies in Oran, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

Last update on December 11, 2025

Reviewed in June 2025
John Hawkins was extremely professional, wanted to hear (in my own words) what the issue was and where he could find the electrical panel. Since the overhead lighting was out, he was prepared with a headlamp and a flashlight. Actually, he brought all the tools needed to complete any work I may...
Handyman of SEMO
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Reviewed in August 2024
Built a sidewalk to redirect water.
Raybrooke Construction and Properties
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Reviewed in February 2021
I hired Joe to prepare my house for sale. He did covering up cracks in walls, touch up of badly infiltrated water damaged areas and paint matching with amazing ease and effectiveness. He even helped replace a garage side entrance door, a WC and some badly corroded down pipes in my gutters. Joe...
Butayi Painting and Decorating
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Reviewed in May 2020
They did not return my intial after hours emergency phone call. I had to call back. The first technician did not even acknowledge the display panel with the code indicating the problem. I asked about it and he said that wasn't the problem. He had to return 2 more times that week. By Friday I had...
Hacker Plumbing & Heating
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Reviewed in April 2014
Our backyard was graded wrong so Stork Landscaping dug us out and the retaining walls re-shifted the way the water flows, so it would flow around the house and not in the house, dug out the patio and pour new concrete. They didn’t have to do this but they did – we have part of the back end of...
Stork Landscaping LLC
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Reviewed in July 2013
We had contacted another company that had missed three appointments to examine system and quote repair cost....We contacted Gurley Hand C and they set a date 48 hrs later. Showed up provided a quote later the same day....started work as promised 3 days later and finished work in three days after...
Gurley And Son Heating & AC
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Reviewed in November 2011
The day before Easter my husband was trying to loosen the water filter that needed to be changed. It's attached directly to the major waterline that enters our house. In doing so, the PVC pipe broke resulting in a scene right out of a Chevy Chase movie. Water was gushing and spraying everywhere...
Coomers Plumbing Heating & AC
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Reviewed in November 2011
From initial contact through completion of job they were responsive and professional. Returned calls, provided timely professional estimate, available for discussion of estimate, provided samples, promised and lived up to installation date, courteous and professional crew, minimal property...
Melvin Mills Roofing, LLC
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Find Water heater pros in Oran

Pobst Hardware & Farm Supply

5.00(

)

•Approved Pro

Pobst Hardware & Farm Supply

5.00(

)

•Approved Pro

Customers say: Quick response

Recommended by 100% of Angi customers

11 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"I was so impressed not only with his knowledge but also his professionalism. He was incredibly cost efficient and was able to work me in so fast to get a much needed appointment completed. I will definitely be referring all of my friends and family."

Bretton S on December 2024

"I was so impressed not only with his knowledge but also his professionalism. He was incredibly cost efficient and was able to work me in so fast to get a much needed appointment completed. I will definitely be referring all of my friends and family."

Bretton S on December 2024

Neli Virtual Appliance Repair

Neli Virtual Appliance Repair

Customers say: Super punctual

27600 local quotes requested

9 years of experience

NEW! Appliance Consultation – Just $35 Get expert advice before you spend on repairs or replacements. A Neli technician will evaluate your issue and help you decide if your appliance can be fixed—or if it’s time for a new one. Virtual Appliance Diagnosis and Repair - Just $45 Service Description: Diagnose or repair your appliance virtually—no need for anyone to enter your home. Neli’s certified technicians guide you step-by-step via secure video chat. How It Works: Book online at nelihome.com or call 833-876-0900 Connect with a tech through our video platform Diagnose or fix the issue in real time Get expert advice and confidence in your next steps What’s Included: Real-time video guidance from a certified technician Diagnosis of the issue OR full repair (when possible) Step-by-step guidance using your smartphone or tablet Safe, contact-free service - no one in your home Flexible scheduling—appointments available daily Perfect For: Appliance fixes HVAC troubleshooting DIY-savvy homeowners Saving time and money on service calls

"Super helpful"

Michele H on November 2025

"Super helpful"

Michele H on November 2025

Ace Construction, Heating & Cooling

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Ace Construction, Heating & Cooling

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38 years of experience

Ace Construction, Heating & Cooling offers quality construction services for the Southeast Missouri Area. We are proud to work with each of our clients to bring skilled craftsmen and technicians to the building site based on the building plans, project requirements, as well as your heating and cooling needs. Whether you’re looking to remodel or repair, Ace Construction, Heating & Cooling can assist you with your needs

Werner Repair Services LLC.

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Werner Repair Services LLC.

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4 years of experience

Hello I am owner of Werner Repair Services and my business offers handyman services, from appliance repair to drywall repair. Most household maintenance I am the guy for you! I have over 8 years of appliance repair and HVAC experience along with plumbing and maintenance experience.

Krell Distributing Co Inc

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Krell Distributing Co Inc

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53 years of experience

Additional DBA - Krell Industries. Family owned & operated. Nationwide service.

Solar Wolf Energy

2.00(

)

Solar Wolf Energy

2.00(

)

10 years of experience

Solar Wolf is a full service solar company with a great reputation and an old world belief to our customers. To under-promise and over-deliver, period. We have 18 years experience in construction, remodeling, roofing, solar water heaters, solar pv systems, battery back-up systems and much more. See what Solar Wolf Energy can do for you!

Residential plumbing specialist New construction, remodel's, service repairs and replacements.

The Hybrid Handyman

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The Hybrid Handyman

No reviews yet

14 years of experience

The Hybrid Handyman is a unique business that offers both technology and home improvement services. Our services offer you a one-call solution for virtually any service you may need for your home.

Les Curtis Services

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Les Curtis Services

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25 years of experience

A small, homegrown company dedicated to getting the job done right the first time. We have 2 to 20 employees at any given time and the tools to get any job done that we take on.

Showing 1-10 of 25

Water Heaters questions, answered by experts

While many older homes don’t need hot water heater expansion tanks, they’re necessary in most newer homes and are required by building codes. These tanks are required by code in areas where there are backflow preventers or pressure regulators on the incoming water pipe between the public water pipes and the water heater. However, tankless water heaters don’t require expansion tanks.

Often, the first issue you might encounter is a lack or loss of power—this could be caused by a tripped switch or a failed heating element. If your hot water is not producing enough power and its size is not the issue, you might need to replace one of its heating elements. A leaking water heater could be caused by tank erosion.

According to the U.S. Department of Energy, tankless water heaters are anywhere from 8% to 34% more efficient than regular water heaters. Exactly how much energy you’ll save depends on your household’s water usage. When you purchase a tankless water heater, you’ll also likely upgrade to more efficient technology than your current water heater, which can add to energy savings.

The time it takes to replace a water heater depends on the complexity of the job. Expect your contractor to spend:

One to three hours on a standard tank-style water heater replacement
Two to three hours on a tankless water heater replacement
Four to six hours replacing a tank-style water heater with a tankless water heater
One hour for each additional parallel or point-of-use water heater

Your project will take longer if you’re switching fuel sources, upgrading to tankless, or relocating your water heater.

It usually takes a professional water heater installer between two and three hours to remove an existing water heater and install a new tank heater. However, it could take four to five hours if they have to work in a small utility closet or another tight area, like a crawl space. Tankless water heaters have a more complicated installation process, so they will take a bit longer. Additionally, a gas water heater requires a connection to a gas line, and that alone can add about an hour to the installation timeline compared to installing an electric water heater.

The Oran, MO homeowners’ guide to water heater services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

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May 2, 2025May 2, 2025
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How Much Does a Water Heater Expansion Tank Cost? [2025 Data]
Wondering how much a water heater expansion tank costs? Use this cost guide to get an accurate estimate and learn how to choose the right one for your home.
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Tankless Water Heater vs. Tank: Which Is Right for You?
Hot water tanks heat your home’s water supply. Find out whether to choose a tankless water heater or tank unit based on cost, maintenance, efficiency, and other factors.