Top-rated tankless water heater installers.

Get matched with top tankless water heater installers in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Tankless water heater installers in Loudon

Avatar for Ramsgate Plumbing, LLC
Ramsgate Plumbing, LLC
8360 Cureton Park Lane
New on HomeAdvisorNew on Angi
Approved Pro
Ramsgate Plumbing, LLC
8360 Cureton Park Lane
New on AngiNew on HomeAdvisor
Approved Pro
2 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


Avatar for Best Plumber, LLC
Best Plumber, LLC
320 Nancy Lynn Ln #3
5.00(
9
)
Approved Pro
Best Plumber, LLC
320 Nancy Lynn Ln #3
5.00(
9
)
Approved Pro
Customers say: Quick response
43 local quotes requested
2 years of experience

Best Plumber is a full service plumbing company located in Knox county. We offer a wide variety of plumbing services. All of our lead technicians are state licensed plumbers with the experience to handle all of your plumbing issues.

"very professional."

Richard S on January 2025

Best Plumber is a full service plumbing company located in Knox county. We offer a wide variety of plumbing services. All of our lead technicians are state licensed plumbers with the experience to handle all of your plumbing issues.

"very professional."

Richard S on January 2025


Avatar for Ivey Plumbing
Ivey Plumbing
1336 Flat Woods Rd
4.42(
13
)
Approved Pro
Ivey Plumbing
1336 Flat Woods Rd
4.42(
13
)
Approved Pro
Customers say: Quality work
58 local quotes requested
30 years of experience

Ivey Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Installer was very professional, he did a very good job. Would highly recommend Ivey Plumbing."

Wilma M on April 2025

Ivey Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Installer was very professional, he did a very good job. Would highly recommend Ivey Plumbing."

Wilma M on April 2025


Avatar for Mr. Rooter Plumbing
Mr. Rooter Plumbing
111 Center Park Dr.
4.53(
462
)
Approved Pro
Mr. Rooter Plumbing
111 Center Park Dr.
4.53(
462
)
Approved Pro
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
43 local quotes requested

When it comes to plumbing, Mr. Rooter is the one to call. Our trained and knowledgeable staff makes your satisfaction our main priority.

"The $7,000 project ended up costing us $123,000 because they dry-cut through the slab in our family room releasing asbestos dust throughout the entire house causing us to have to live in a Hampton Inn for 43 days. They cut the slab without supporting it and it collapsed enough to cause our brick fireplace face to have several cracks in it. With all the repairs we had to have done, the asbestos abatement project and replacing all our clothing, betting and some furniture, and with the amount our insurance company shorted us, we lost $43,000 of our retirement savings. Avoid this contractor like the plague!"

Mitchell O on October 2024

When it comes to plumbing, Mr. Rooter is the one to call. Our trained and knowledgeable staff makes your satisfaction our main priority.

"The $7,000 project ended up costing us $123,000 because they dry-cut through the slab in our family room releasing asbestos dust throughout the entire house causing us to have to live in a Hampton Inn for 43 days. They cut the slab without supporting it and it collapsed enough to cause our brick fireplace face to have several cracks in it. With all the repairs we had to have done, the asbestos abatement project and replacing all our clothing, betting and some furniture, and with the amount our insurance company shorted us, we lost $43,000 of our retirement savings. Avoid this contractor like the plague!"

Mitchell O on October 2024


Avatar for The Plumbing Authority, Inc.
The Plumbing Authority, Inc.
1209 Buchanan Ave
4.67(
199
)
Approved Pro
The Plumbing Authority, Inc.
1209 Buchanan Ave
4.67(
199
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
38 local quotes requested

At The Plumbing Authority, we know that you want to be able to relax and not deal with plumbing problems. Undependable plumbing causes you stress and frustration. You deserve to enjoy your home without worrying about your plumbing. This is why we send licensed plumbers out to your home, so that you can relax knowing your problem is in good hands. We do not just care about plumbing. We care about you and your home. We have helped thousands of homeowners solve their plumbing problems for over 29 years. Do not let unexpected plumbing issues ruin your day. Instead, find relief when you call us or schedule online.

"They came and fixed my original problem and found another problem. They were good on fixing all the problems I had"

David O on March 2025

At The Plumbing Authority, we know that you want to be able to relax and not deal with plumbing problems. Undependable plumbing causes you stress and frustration. You deserve to enjoy your home without worrying about your plumbing. This is why we send licensed plumbers out to your home, so that you can relax knowing your problem is in good hands. We do not just care about plumbing. We care about you and your home. We have helped thousands of homeowners solve their plumbing problems for over 29 years. Do not let unexpected plumbing issues ruin your day. Instead, find relief when you call us or schedule online.

"They came and fixed my original problem and found another problem. They were good on fixing all the problems I had"

David O on March 2025


Avatar for WhizPro Plumber
WhizPro Plumber
PO BOX 6143
5.00(
10
)
Approved Pro
WhizPro Plumber
PO BOX 6143
5.00(
10
)
Approved Pro
Customers say: Quick response
Emergency services offered
Warranties offered

With over 5 years of experience, I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!

"I was very impressed with how quickly they responded to my initial request. They kept me updated on my appt time. The technician that came out was very knowledgeable and friendly. Definitely recommend them!!"

Rachael S on April 2025

With over 5 years of experience, I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!

"I was very impressed with how quickly they responded to my initial request. They kept me updated on my appt time. The technician that came out was very knowledgeable and friendly. Definitely recommend them!!"

Rachael S on April 2025


Avatar for Imperial Plumbing and Drain Cleaning LLC
Imperial Plumbing and Drain Cleaning LLC
4118 Fulton Rd
4.88(
12
)
Approved Pro
Imperial Plumbing and Drain Cleaning LLC
4118 Fulton Rd
4.88(
12
)
Approved Pro
Customers say: Super punctual
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

With several years of experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"excellent service for the task"

Rosa T on March 2024

With several years of experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"excellent service for the task"

Rosa T on March 2024


ASAP Home Worx, LLC
127 Black Oak Hill Lane
5.00(
1
)
Approved Pro
ASAP Home Worx, LLC
127 Black Oak Hill Lane
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
276 local quotes requested

ASAP Homeworx is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Bill was excellent! He was on time, personable, and very knowledgeable. Amazing customer service. 10/10 I wouldn’t choose anyone else for plumbing/drain work!"

Alysha s on January 2025

ASAP Homeworx is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Bill was excellent! He was on time, personable, and very knowledgeable. Amazing customer service. 10/10 I wouldn’t choose anyone else for plumbing/drain work!"

Alysha s on January 2025


Avatar for Robert Johnson Plumbing
Robert Johnson Plumbing
58 Walden Pond Drive
5.00(
23
)
Approved Pro
Robert Johnson Plumbing
58 Walden Pond Drive
5.00(
23
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
87 local quotes requested

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"Working with Robert was a pleasure. From the first phone call to the successful installation, Robert was courteous and professional. He promptly responded my text messages and directly answered my phone calls. He did a beautiful job putting in a new water heater for us. He taught us a few ways to maintain the water heater for a longer usage life. He cleaned up after the work. And, he was very up-front about his price, which is extremely fair."

Shehong C on December 2024

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"Working with Robert was a pleasure. From the first phone call to the successful installation, Robert was courteous and professional. He promptly responded my text messages and directly answered my phone calls. He did a beautiful job putting in a new water heater for us. He taught us a few ways to maintain the water heater for a longer usage life. He cleaned up after the work. And, he was very up-front about his price, which is extremely fair."

Shehong C on December 2024


Avatar for Lawson excavating
Lawson excavating
7134 Glade Creek Rd
5.00(
4
)
Approved Pro
Lawson excavating
7134 Glade Creek Rd
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
168 local quotes requested

Lawson excavating we off septic tanks, dirt work, driveway install, waterlines, electric lines, pond building and lot clearing Free estimates

"Excellent job"

Susie S on June 2023

Lawson excavating we off septic tanks, dirt work, driveway install, waterlines, electric lines, pond building and lot clearing Free estimates

"Excellent job"

Susie S on June 2023

...
Showing 1-10 of 515

Tankless water heater installations FAQs

Yes, although they have a higher upfront cost compared to traditional units, tankless water heaters can be worth the investment for many homeowners. They heat water on demand, eliminating standby energy losses and leading to 24% to 34% greater energy efficiency for homes using up to 41 gallons of hot water daily. Tankless units last longer—around 20 years with proper maintenance—and require less space than traditional units. They also reduce the risk of leaks and water damage since there's no tank to corrode and fail.

Tankless water heaters, including gas-powered models, do require electricity to operate components like the ignition and control systems. This means they won't function during a power outage. If you live in an area prone to outages and want to ensure a continuous hot water supply, consider installing a battery backup system or generator to keep your tankless water heater running when the power goes out.

You should set your tankless water heater to 120 degrees Fahrenheit for optimal safety and efficiency, as recommended by the U.S. Consumer Product Safety Commission. Setting the temperature at 120 degrees prevents scalding accidents, particularly for children and the elderly, and reduces energy consumption. Temperatures above 140 degrees increase the risk of burns and promote mineral buildup, which can decrease the system's efficiency.

A 20-minute shower uses 50 to 60 gallons of water, assuming a flow rate of 2.5 to 3 gallons per minute. A typical whole-house tankless water heater can produce 4 to 8 gallons of hot water per minute, providing continuous hot water for long showers. By installing low-flow showerheads and reducing shower time, you decrease water consumption and energy costs, maximizing the efficiency of your tankless system.

With proper maintenance, a tankless water heater lasts around 20 years, significantly longer than conventional tank water heaters, which last between 8 and 12 years. Regular inspections and timely repairs can further extend its lifespan. To keep your tankless system operating efficiently, have it inspected or serviced annually and address any minor issues promptly by contacting a local tankless water heater repair service.

The homeowners guide to tankless water heater installations
From average costs to expert advice, get all the answers you need to get your job done.
water main being installed in yard
Apr 30, 2025
Apr 30, 2025
Budget for main water line replacement costs based on factors such as accessibility, depth, length, materials, permits, labor, and more.
Beautiful large white bathroom
Apr 30, 2025
Apr 30, 2025
Budget for walk-in bathtub costs based on factors such as bathtub type, labor, plumbing and electrical work, additional accessibility features, and more.
marble kitchen counter with gold faucet
Apr 28, 2025
Apr 28, 2025
Explore the average cost to replace a kitchen faucet with a professional plumber based on factors like faucet type, features, labor, and unexpected costs.
Toilet and bidet in bathroom
Apr 28, 2025
Apr 28, 2025
Use this guide to budget for bidet installation costs based on factors such as bidet type, attachments, features, parts, labor, and more.
plumber installing sewer main pipes in the ground
Apr 25, 2025
Apr 25, 2025
Understand what goes into installing a sewer line, including materials, labor, permits, and potential landscaping considerations, to ensure a smooth and compliant connection to your local sewer system.
water main being repaired by plumbers
Apr 24, 2025
Apr 24, 2025
Main water line leak repair costs depend on how much of the line needs repair and other factors. Learn what influences the price before you take on this project.
Share project details to get started.