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 Guilford

Avatar for Airtech Heating and Cooling, LLC
Airtech Heating and Cooling, LLC
12 Summer Island Point
4.78(
32
)
Approved Pro
Airtech Heating and Cooling, LLC
12 Summer Island Point
4.78(
32
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
17 years of experience

Airtech Heating and Cooling, LLC, is a New Haven locally owned and operated company that values quality in all aspects of business. The cornerstone of our service is responsiveness with professional quality guaranteed. We have over 40 years experience in the heating and cooling industry. Our services are customized to your individual needs, paying close attention to the details of your project. We look forward to gaining you as another satisfied customer.

"AirTech and Mark Miller responded by calling me almost immediately after my online inquiry to Home Advisor's for service on my gas furnace. It was on December 23rd, Saturday approximately 6pm. He came within the hour and fixed the problem with my furnace. Considering a weekend, after hours and also a holiday weekend at that, extremely reasonable price. I would use them again and I would recommend them highly, as well."

Pat H on January 2024

Airtech Heating and Cooling, LLC, is a New Haven locally owned and operated company that values quality in all aspects of business. The cornerstone of our service is responsiveness with professional quality guaranteed. We have over 40 years experience in the heating and cooling industry. Our services are customized to your individual needs, paying close attention to the details of your project. We look forward to gaining you as another satisfied customer.

"AirTech and Mark Miller responded by calling me almost immediately after my online inquiry to Home Advisor's for service on my gas furnace. It was on December 23rd, Saturday approximately 6pm. He came within the hour and fixed the problem with my furnace. Considering a weekend, after hours and also a holiday weekend at that, extremely reasonable price. I would use them again and I would recommend them highly, as well."

Pat H on January 2024


Avatar for E and R Mechanical
E and R Mechanical
410 W River St
4.73(
237
)
Approved Pro
E and R Mechanical
410 W River St
4.73(
237
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
86 local quotes requested

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big, or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business.

"Customer service was excellent. Arrived on time and completed the job in a timely manner at the quoted cost."

Barbara T on April 2025

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big, or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business.

"Customer service was excellent. Arrived on time and completed the job in a timely manner at the quoted cost."

Barbara T on April 2025


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
137 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 Everything Under The Roof LLC
Everything Under The Roof LLC
PO Box 844
4.87(
38
)
Approved Pro
Everything Under The Roof LLC
PO Box 844
4.87(
38
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
100 local quotes requested

We pride ourselves on being a unique construction company. Everything Under the Roof is an interior, residential construction company owned by Kim and Jay Spanier. At work we are a husband and wife team, but at home we are mom and dad, so we truly understand the importance of keeping your project orderly and on time, while keeping your family (including your pets) safe. We can also guarantee NO high pressure sales calls, and no crabby, condescending construction guys working on your home improvement project – just our family helping yours! Kim is your main point of contact through the project. She walks you through the construction process, acts as your personal construction jargon translator, and, most importantly, she is the budget master. Kim will help you shop for materials so that you stay on budget. Jay is the jobsite superintendent. He manages the day to day activities of your remodeling/construction project, he coordinates and manages the sub-contractors, and it’s his skillful carpentry that will transform your home. All of our projects work within the existing footprint of your house. What exactly does that mean? Well, in a nut shell, we don’t do additions, and we won’t raise your roof. We find all the hidden, un-used spaces in your house and re-create your floor plan to work for you and your family.

"Kim and Jay are the best contracting group I have ever worked with. Thorough, responsive and always friendly and courteous."

Alice W on December 2022

We pride ourselves on being a unique construction company. Everything Under the Roof is an interior, residential construction company owned by Kim and Jay Spanier. At work we are a husband and wife team, but at home we are mom and dad, so we truly understand the importance of keeping your project orderly and on time, while keeping your family (including your pets) safe. We can also guarantee NO high pressure sales calls, and no crabby, condescending construction guys working on your home improvement project – just our family helping yours! Kim is your main point of contact through the project. She walks you through the construction process, acts as your personal construction jargon translator, and, most importantly, she is the budget master. Kim will help you shop for materials so that you stay on budget. Jay is the jobsite superintendent. He manages the day to day activities of your remodeling/construction project, he coordinates and manages the sub-contractors, and it’s his skillful carpentry that will transform your home. All of our projects work within the existing footprint of your house. What exactly does that mean? Well, in a nut shell, we don’t do additions, and we won’t raise your roof. We find all the hidden, un-used spaces in your house and re-create your floor plan to work for you and your family.

"Kim and Jay are the best contracting group I have ever worked with. Thorough, responsive and always friendly and courteous."

Alice W on December 2022


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
3269 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 Imagine Remodel
Imagine Remodel
4 Alcap Ridge
5.00(
4
)
Approved Pro
Imagine Remodel
4 Alcap Ridge
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1041 local quotes requested

Home remodeling company specializing in Bathrooms and Kitchens.

"Had my bathroom redone and it came out beautiful. The whole process was seamless and the communication was excellent. Will use again for future projects!"

Robin L on July 2024

Home remodeling company specializing in Bathrooms and Kitchens.

"Had my bathroom redone and it came out beautiful. The whole process was seamless and the communication was excellent. Will use again for future projects!"

Robin L on July 2024


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
947 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


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
1564 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 Wps remodeling
Wps remodeling
40a Brookside Ave E
4.96(
24
)
Approved Pro
Wps remodeling
40a Brookside Ave E
4.96(
24
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
280 local quotes requested

Remodeling general, kitchen, bathroom, finish carpentry and framing, small addition and decks. We do not offer solar panel installation or services.

"Very professional, if I called I received a response right away. I live my newly remodeled bathroom."

Diane g on February 2025

Remodeling general, kitchen, bathroom, finish carpentry and framing, small addition and decks. We do not offer solar panel installation or services.

"Very professional, if I called I received a response right away. I live my newly remodeled bathroom."

Diane g on February 2025

...
Showing 1-10 of 535

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.