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 Shelton

EcoFlow, LLC
5 Commerce Rd Ste. 701
5.00(
5
)
Approved Pro
EcoFlow, LLC
5 Commerce Rd Ste. 701
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

EcoFlow, LLC, is a fully licensed and insured (in Connecticut and Westchester County, NY) locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 16 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"He was very professional, he took care of everything, he executes the plan, always on time, very clear on what has to be done, and upfront about the cost of labor and materials, he cleans up after themselves, pleasant and good conversation."

Homeowner on August 2020

EcoFlow, LLC, is a fully licensed and insured (in Connecticut and Westchester County, NY) locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 16 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"He was very professional, he took care of everything, he executes the plan, always on time, very clear on what has to be done, and upfront about the cost of labor and materials, he cleans up after themselves, pleasant and good conversation."

Homeowner on August 2020


Avatar for Precise HVAC Home Services
Precise HVAC Home Services
35 Wooster Court, Unit D
4.93(
22
)
Approved Pro
Precise HVAC Home Services
35 Wooster Court, Unit D
4.93(
22
)
Approved Pro
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
136 local quotes requested

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients, we make every effort to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"5 stars"

Brandon M on January 2025

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients, we make every effort to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"5 stars"

Brandon M on January 2025


Avatar for Badaracco Plumbing & Heating, Inc.
Badaracco Plumbing & Heating, Inc.
27 Creeping Hemlock Drive
4.53(
178
)
Approved Pro
Badaracco Plumbing & Heating, Inc.
27 Creeping Hemlock Drive
4.53(
178
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
23 years of experience

In business over 35 years, Badaracco Plumbing & Heating, Inc., they can handle all of your residential or commercial needs big or small. We care about you and we take your investment seriously! We know that no matter how big or small your project is, it is important to you. We realize that not everyone knows or understands what steps are necessary to complete the improvement or installation process and we are committed to helping you understand every step of the way. Keeping your inconvenience to a minimum during any project is our priority and we will utilize our relationship with other suppliers, trades people and industry professionals to keep your project on time and on budget. We go the distance to ensure your experience with our company is a pleasurable one. Call now for a free consultation and estimate because we can help connect you closer to your dream.

"Drastically over priced. $250 for initial hr. $95 per hr after per plumber for 2 plumbers on a job that could have bee. done by one. One plumbers appeared to be an apprentice. He went upstairs where our bedrooms were located and used our bathroom without asking first. I found that to be very unprofessional. Sorry we were once loyal customers but must part ways."

Mardeika M on October 2024

In business over 35 years, Badaracco Plumbing & Heating, Inc., they can handle all of your residential or commercial needs big or small. We care about you and we take your investment seriously! We know that no matter how big or small your project is, it is important to you. We realize that not everyone knows or understands what steps are necessary to complete the improvement or installation process and we are committed to helping you understand every step of the way. Keeping your inconvenience to a minimum during any project is our priority and we will utilize our relationship with other suppliers, trades people and industry professionals to keep your project on time and on budget. We go the distance to ensure your experience with our company is a pleasurable one. Call now for a free consultation and estimate because we can help connect you closer to your dream.

"Drastically over priced. $250 for initial hr. $95 per hr after per plumber for 2 plumbers on a job that could have bee. done by one. One plumbers appeared to be an apprentice. He went upstairs where our bedrooms were located and used our bathroom without asking first. I found that to be very unprofessional. Sorry we were once loyal customers but must part ways."

Mardeika M on October 2024


Avatar for Celco Heating & Air Conditioning
Celco Heating & Air Conditioning
467 Bishop Avenue
4.78(
103
)
Approved Pro
Celco Heating & Air Conditioning
467 Bishop Avenue
4.78(
103
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
42 local quotes requested

CONSISTENCY * DEDICATION TO QUALITY WORK * CUSTOMER SERVICE CELCO Heating and Air Conditioning is a mechanical firm built on 40 years of steadfast ethics and unrivaled attention to detail. The skill sets we possess, allow us to serve our customers in a top-notch manner. The ability to offer Design Build, Installation, Retrofitting and Service Work in a meticulous and enthusiastic fashion - sets us apart from other outfits. We hope you will consider giving CELCO heating and air conditioning the chance to earn your trust.

"Thorough explanation, great service, neat installation and competitive pricing. Would hire again."

Andy S on March 2024

CONSISTENCY * DEDICATION TO QUALITY WORK * CUSTOMER SERVICE CELCO Heating and Air Conditioning is a mechanical firm built on 40 years of steadfast ethics and unrivaled attention to detail. The skill sets we possess, allow us to serve our customers in a top-notch manner. The ability to offer Design Build, Installation, Retrofitting and Service Work in a meticulous and enthusiastic fashion - sets us apart from other outfits. We hope you will consider giving CELCO heating and air conditioning the chance to earn your trust.

"Thorough explanation, great service, neat installation and competitive pricing. Would hire again."

Andy S on March 2024


Avatar for HM Construction & Painting
HM Construction & Painting
60 Newtown Rd
4.57(
148
)
Approved Pro
HM Construction & Painting
60 Newtown Rd
4.57(
148
)
Approved Pro
Customers say: Quick response
1044 local quotes requested
32 years of experience

HM Construction and Painting was founded in 1990 to provide customers with the most incredible home remodeling and renovating services in Fairfield County. We Provide Architectural and Structural Drawing Design Services. We provide general contractor services to both residential and commercial customers. Above all, our goal is to give you an extraordinary standard of excellence, quality, and professionalism each and every time you hire us. We know that referrals run businesses, so we strive to give you the best experience possible. From painting to carpentry home repair and from roofing to flooring, there is very little we can’t do! We specialize in bringing homeowners’ dreams to life. Whether you’re making a few cosmetic changes or you’re gutting a room and starting over, we are fully equipped to take your project on. We proudly provide service to Greenwich, CT and Darien, CT, as well as the surrounding areas! Ready to get started? Take a look at our Services page to see what we can offer you. Don’t forget, we offer free estimates at your convenience, so feel free to contact us at any time for an estimate.

"We were very pleased with the job performed. Helio's team expanded and renovated our small master bathroom. We took out a large closet and converted it into our shower. Once started, they worked quickly and efficiently. We did have a few small hiccups, namely using our garage to cut tiles and mix thinset, which created an exorbitant amount of dust coating my tools, bikes, and anything else that was stored in the garage. We also had an issue with the cleanliness of the home after some of the workers left, however, after we brought it to Helio's attention, he made sure to tell the team to do a better job moving forward. Contract was a little confusing, so I would encourage many questions to clarify things ahead of time such as timeline for selecting certain items, confirming when the next payments are due etc. All in all, we're pleased with the project and how it turned out."

Mike M on February 2025

HM Construction and Painting was founded in 1990 to provide customers with the most incredible home remodeling and renovating services in Fairfield County. We Provide Architectural and Structural Drawing Design Services. We provide general contractor services to both residential and commercial customers. Above all, our goal is to give you an extraordinary standard of excellence, quality, and professionalism each and every time you hire us. We know that referrals run businesses, so we strive to give you the best experience possible. From painting to carpentry home repair and from roofing to flooring, there is very little we can’t do! We specialize in bringing homeowners’ dreams to life. Whether you’re making a few cosmetic changes or you’re gutting a room and starting over, we are fully equipped to take your project on. We proudly provide service to Greenwich, CT and Darien, CT, as well as the surrounding areas! Ready to get started? Take a look at our Services page to see what we can offer you. Don’t forget, we offer free estimates at your convenience, so feel free to contact us at any time for an estimate.

"We were very pleased with the job performed. Helio's team expanded and renovated our small master bathroom. We took out a large closet and converted it into our shower. Once started, they worked quickly and efficiently. We did have a few small hiccups, namely using our garage to cut tiles and mix thinset, which created an exorbitant amount of dust coating my tools, bikes, and anything else that was stored in the garage. We also had an issue with the cleanliness of the home after some of the workers left, however, after we brought it to Helio's attention, he made sure to tell the team to do a better job moving forward. Contract was a little confusing, so I would encourage many questions to clarify things ahead of time such as timeline for selecting certain items, confirming when the next payments are due etc. All in all, we're pleased with the project and how it turned out."

Mike M on February 2025


Avatar for Omega Development LLC
Omega Development LLC
278 Post Road East
4.67(
12
)
Approved Pro
Omega Development LLC
278 Post Road East
4.67(
12
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
934 local quotes requested

Omega Development is a Fairfield, County staple. With over 20+ years of experience Omega is your one stop shop for all things construction.

"I recently had an asphalt driveway put in. The crew was very professional. The driveway is smooth and very happy with the quality of the new driveway. They even went above and beyond and put in a small drainage area for water runoff. It has definitely improved the appearance of my home."

Elaine A on February 2025

Omega Development is a Fairfield, County staple. With over 20+ years of experience Omega is your one stop shop for all things construction.

"I recently had an asphalt driveway put in. The crew was very professional. The driveway is smooth and very happy with the quality of the new driveway. They even went above and beyond and put in a small drainage area for water runoff. It has definitely improved the appearance of my home."

Elaine A on February 2025


Avatar for Long Home Products
Long Home Products
16 International Dr
5.00(
1
)
Approved Pro
Long Home Products
16 International Dr
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3262 local quotes requested

With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Quick, one day service, cleaned up after, friendly they even double checked with us before installing safety handles and shelves to make sure they were exactly where we wanted them."

Shelley A on March 2025

With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Quick, one day service, cleaned up after, friendly they even double checked with us before installing safety handles and shelves to make sure they were exactly where we wanted them."

Shelley A on March 2025


Avatar for Custom Build and Remodeling, LLC
Custom Build and Remodeling, LLC
Wildflower Drive
5.00(
2
)
Approved Pro
Custom Build and Remodeling, LLC
Wildflower Drive
5.00(
2
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
614 local quotes requested

We are dedicated to providing our clients with the very best in excavation and building site services. We specialize in residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"He was one of the best contractor I have had the pleasure of working with. He is still working on my basement, he is reliable and very easy to work with. He was very reasonable in his pricing and let me know whenever something was extra when there were changes to the original understanding. I would definitely work with him on future projects and would recommend him to my friends and family."

manohar p on March 2025

We are dedicated to providing our clients with the very best in excavation and building site services. We specialize in residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"He was one of the best contractor I have had the pleasure of working with. He is still working on my basement, he is reliable and very easy to work with. He was very reasonable in his pricing and let me know whenever something was extra when there were changes to the original understanding. I would definitely work with him on future projects and would recommend him to my friends and family."

manohar p on March 2025


Avatar for Dolphin Home Improvement LLC
Dolphin Home Improvement LLC
87 Barn Finch Circle
5.00(
15
)
Approved Pro
Dolphin Home Improvement LLC
87 Barn Finch Circle
5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
938 local quotes requested

Dolphin Home Improvement LLC is a family owned and operated company that has been serving Connecticut for over 20 years.We all know there are plenty of options when choosing a contractor whether you're in the market for Roofing,Siding or Windows but we feel that our service, products, workmanship and industry knowledge is a tough package to beat.Honesty and integrity always come first when you’re dealing with Dolphin Home Improvement LLC.You’ll get a contractor that has the experience and expertise to create superior quality . We stand behind the quality of our work and guarantee 100% customer satisfaction.

"Very professional and personable! They were very detail oriented and did the job in a very reasonable time. They made sure that everything was to how we wanted and explained everything. Would absolutely use them again with some other work in the future!"

Brandon T on March 2025

Dolphin Home Improvement LLC is a family owned and operated company that has been serving Connecticut for over 20 years.We all know there are plenty of options when choosing a contractor whether you're in the market for Roofing,Siding or Windows but we feel that our service, products, workmanship and industry knowledge is a tough package to beat.Honesty and integrity always come first when you’re dealing with Dolphin Home Improvement LLC.You’ll get a contractor that has the experience and expertise to create superior quality . We stand behind the quality of our work and guarantee 100% customer satisfaction.

"Very professional and personable! They were very detail oriented and did the job in a very reasonable time. They made sure that everything was to how we wanted and explained everything. Would absolutely use them again with some other work in the future!"

Brandon T on March 2025


Avatar for Connecticut Custom Creations
Connecticut Custom Creations
260 Hartford Avenue
4.82(
22
)
Approved Pro
Connecticut Custom Creations
260 Hartford Avenue
4.82(
22
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
944 local quotes requested

Our specialty is Kitchen,Bath,Basement and attic. We get to help people build their homes which is something we value above all else. I am an owner-operated business with 25+ years' experience. We take on any small or large project you may have.

"I'm amazed of how my shower upgrade turned out. I still can't believe cts creation finished in one day. I recommend cts creation to anybody and everybody. They killed it!"

Zach t on August 2024

Our specialty is Kitchen,Bath,Basement and attic. We get to help people build their homes which is something we value above all else. I am an owner-operated business with 25+ years' experience. We take on any small or large project you may have.

"I'm amazed of how my shower upgrade turned out. I still can't believe cts creation finished in one day. I recommend cts creation to anybody and everybody. They killed it!"

Zach t on August 2024

...
Showing 1-10 of 949

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.
outdoor water lines with backflow preventer
Apr 21, 2025
Apr 21, 2025
Backflow preventer costs depend on type, size, location, and labor costs. This guide breaks down the cost factors to help you budget.
plumber cleaning a home sewer line in yard
Apr 22, 2025
Apr 22, 2025
Budget for main sewer line clog repair costs based on factors such as cleaning method, sewer age, project complexity, permits, labor, and more.
water faucet on exterior of brick house
Apr 22, 2025
Apr 22, 2025
Budget for the cost to replace a hose bib based on factors such as faucet type, location, plumbing line installation, permits, labor, and more.
A man installs a new shower
Apr 17, 2025
Apr 17, 2025
A shower remodel can completely transform your bathroom. Start budgeting for shower remodel costs and get ready for the shower of your dreams.
A stylish toilet in bathroom
Apr 1, 2025
Apr 1, 2025
Budget for sewer ejector pump costs based on factors such as pump capacity, pump material, maintenance, professional labor, and more.
new toilet in modern bathroom
Mar 31, 2025
Mar 31, 2025
Learn how much toilet installation costs, exploring factors like labor, plumbing, removal fees, and additional expenses.
Share project details to get started.