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 Danbury

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


Premium Northeast Plumbing LLC
148 Isaiah Smith Ln
4.88(
4
)
Approved Pro
Premium Northeast Plumbing LLC
148 Isaiah Smith Ln
4.88(
4
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 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! Call Today!

"I wasn’t very happy with the price and the did the job the next day"

Michael T on March 2024

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! Call Today!

"I wasn’t very happy with the price and the did the job the next day"

Michael T on March 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 Drain Away Sewer Service Inc
Drain Away Sewer Service Inc
P.o. Box 3065
4.82(
38
)
Approved Pro
Drain Away Sewer Service Inc
P.o. Box 3065
4.82(
38
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
24 local quotes requested

At Drain Away Sewer Service, Inc., we put our customers needs first! We offer a range of drain services and we know that our customer's are the backbone of our success. Response times are quick through our 24-hour emergency service and we pride ourselves on providing competitive, up-front costs. Whether you take advantage of our maintenance and service contracts for savings, or you use us for one-time emergency services, Drain Away Sewer Service, Inc. will deliver on professional, reliable and quality work. Drain Away Sewer Service, Inc. provides both residential and commercial drain cleaning services 24 hours a day, 7 days a week and 365 days per year. Offering over 10 years of experience in the drain cleaning business, our qualified staff is prepared to handle everything from a clogged toilet to main sewer services. We are centrally located to service both Westchester and Fairfield Counties.

"Richard from Drain Away service came out the next day and fixed the clogged drain. He was also very helpful with getting Servpro out to do clean up. Richard provided full and efficient services. Very pleasant and reasonably priced. I would definitely recommend Drain Away for any plumbing issues and would use them again if needed."

Paula A on February 2025

At Drain Away Sewer Service, Inc., we put our customers needs first! We offer a range of drain services and we know that our customer's are the backbone of our success. Response times are quick through our 24-hour emergency service and we pride ourselves on providing competitive, up-front costs. Whether you take advantage of our maintenance and service contracts for savings, or you use us for one-time emergency services, Drain Away Sewer Service, Inc. will deliver on professional, reliable and quality work. Drain Away Sewer Service, Inc. provides both residential and commercial drain cleaning services 24 hours a day, 7 days a week and 365 days per year. Offering over 10 years of experience in the drain cleaning business, our qualified staff is prepared to handle everything from a clogged toilet to main sewer services. We are centrally located to service both Westchester and Fairfield Counties.

"Richard from Drain Away service came out the next day and fixed the clogged drain. He was also very helpful with getting Servpro out to do clean up. Richard provided full and efficient services. Very pleasant and reasonably priced. I would definitely recommend Drain Away for any plumbing issues and would use them again if needed."

Paula A on February 2025


Avatar for Portchester Connection
Portchester Connection
48 Loring Ave
4.87(
30
)
Approved Pro
Portchester Connection
48 Loring Ave
4.87(
30
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
386 local quotes requested

Proud winner of the 2015 - 2018 Super Service Award. Specializing in kitchen and bathroom remodels for over 30 years - Michael the owner is always on site, ensuring your home project is never left alone. He's on every job from start to finish until it's completed. Additional number -(914) 490-4742 Michael interacts directly with each customer from start to finish providing a true mom and pop feel. With the needs of each individual customer at the forefront of his mind - and to ensure a worry free experience - The customer pays no mark- up for the products used during the projects. He welcomes you to come along. This will give you peace of mind knowing, you pay what he pays! Michael prides himself specifically on his kitchen & bathroom remodel projects. Michael has been know to facilitate the greater senior community by personally bringing the samples to your home so you don't have to leave. **Shop at home - without the hassle! This provides worry free experience for loved ones who don't have the flexibility to leave home. Licensed Electrician and Plumber on staff.

"Mike did our kitchen last year so we asked him to come back and do the bathroom. Again, everything was done on time and to our great satisfaction. Mike is unflappable, a consummate professional. When the inevitable unexpected issues arose he always found a way to solve the problem. We own a coop, so the fact that he has all the necessary certifications and insurance was a big relief."

david w on March 2023

Proud winner of the 2015 - 2018 Super Service Award. Specializing in kitchen and bathroom remodels for over 30 years - Michael the owner is always on site, ensuring your home project is never left alone. He's on every job from start to finish until it's completed. Additional number -(914) 490-4742 Michael interacts directly with each customer from start to finish providing a true mom and pop feel. With the needs of each individual customer at the forefront of his mind - and to ensure a worry free experience - The customer pays no mark- up for the products used during the projects. He welcomes you to come along. This will give you peace of mind knowing, you pay what he pays! Michael prides himself specifically on his kitchen & bathroom remodel projects. Michael has been know to facilitate the greater senior community by personally bringing the samples to your home so you don't have to leave. **Shop at home - without the hassle! This provides worry free experience for loved ones who don't have the flexibility to leave home. Licensed Electrician and Plumber on staff.

"Mike did our kitchen last year so we asked him to come back and do the bathroom. Again, everything was done on time and to our great satisfaction. Mike is unflappable, a consummate professional. When the inevitable unexpected issues arose he always found a way to solve the problem. We own a coop, so the fact that he has all the necessary certifications and insurance was a big relief."

david w on March 2023


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 Elite Remodeling Services LLC
Elite Remodeling Services LLC
29 Deerfield Lane
5.00(
5
)
Approved Pro
Elite Remodeling Services LLC
29 Deerfield Lane
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1556 local quotes requested

10 years worth of construction experience in various industries.

"Mike and his crew were wonderful, knowledgable, professional and efficient. The quality of the work was outstanding and the whole process was smooth and easy! Can’t recommend them highly enough!"

Brianna P on November 2024

10 years worth of construction experience in various industries.

"Mike and his crew were wonderful, knowledgable, professional and efficient. The quality of the work was outstanding and the whole process was smooth and easy! Can’t recommend them highly enough!"

Brianna P on November 2024


Avatar for Universe Home Services
Universe Home Services
3782 Merrick Rd
4.54(
443
)
Approved Pro
Universe Home Services
3782 Merrick Rd
4.54(
443
)
Approved Pro
Customers say: Super punctual
2882 local quotes requested
71 years of experience

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Another terrific team just left my home after summer a/c service at our home Always respectful and on time Answered all my questions and will advise us on contractor for vent cleaning Glad we use this terrific company"

John B on April 2025

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Another terrific team just left my home after summer a/c service at our home Always respectful and on time Answered all my questions and will advise us on contractor for vent cleaning Glad we use this terrific company"

John B on April 2025

...
Showing 1-10 of 915

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.