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 Sussex

Jerry's Plumbing Services, LLC
6730 Roosevelt Rd
5.00(
4
)
Approved Pro
Jerry's Plumbing Services, LLC
6730 Roosevelt Rd
5.00(
4
)
Approved Pro
Customers say: Quick response
1 years of experience
Free onsite estimate

Your trusted partner for all your plumbing needs, offering professional and reliable solutions for residential

"Jerry did a great job very pleasant to work with very professional and very reasonably priced"

Joel K on April 2025

Your trusted partner for all your plumbing needs, offering professional and reliable solutions for residential

"Jerry did a great job very pleasant to work with very professional and very reasonably priced"

Joel K on April 2025


Avatar for BIG DAVE'S SERVICES
BIG DAVE'S SERVICES
9131 W Walker St
4.12(
111
)
Approved Pro
BIG DAVE'S SERVICES
9131 W Walker St
4.12(
111
)
Approved Pro
Customers say: Quality work
1341 local quotes requested
23 years of experience

Why Choose Big Dave’s? To state it as clearly as possible, we’re not the right fit for everyone. We’re not the fastest. We’re not the cheapest. But our clients say, we are the best! We absolutely insist on doing things right the first time. No excuses. Period. If you are demanding, hard to please, and/or persnickety, we’ll get along great. We refuse to settle for anything less than the very best, and our clients appreciate our attention to even the smallest detail. Contact us today to get the process started!

"The very best thing about Big Dave's is that he shows up when he says he will, he does the job we agreed on, and he cleans up after himself. Very different from any other GC I've dealt with in nearly forty years. Superior work at all times; fixes issues when required without question or demur. I'll have no other GC darken my doors ever again."

John B on September 2023

Why Choose Big Dave’s? To state it as clearly as possible, we’re not the right fit for everyone. We’re not the fastest. We’re not the cheapest. But our clients say, we are the best! We absolutely insist on doing things right the first time. No excuses. Period. If you are demanding, hard to please, and/or persnickety, we’ll get along great. We refuse to settle for anything less than the very best, and our clients appreciate our attention to even the smallest detail. Contact us today to get the process started!

"The very best thing about Big Dave's is that he shows up when he says he will, he does the job we agreed on, and he cleans up after himself. Very different from any other GC I've dealt with in nearly forty years. Superior work at all times; fixes issues when required without question or demur. I'll have no other GC darken my doors ever again."

John B on September 2023


Avatar for Badger Water LLC
Badger Water LLC
1001 N Page St
4.83(
6
)
Approved Pro
Badger Water LLC
1001 N Page St
4.83(
6
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
79 local quotes requested

Badger Water is family owned and operated. We have been in business for over 35 years. We are proud to provide service within 24 hours, if not immediately. Badger Water employees provide prompt, efficient and friendly service. Contact Badger Water today for a water analysis and the lowest prices for all your water needs.

"Fast! Very knowledgable."

Kevin H on November 2024

Badger Water is family owned and operated. We have been in business for over 35 years. We are proud to provide service within 24 hours, if not immediately. Badger Water employees provide prompt, efficient and friendly service. Contact Badger Water today for a water analysis and the lowest prices for all your water needs.

"Fast! Very knowledgable."

Kevin H on November 2024


Avatar for HDM Construction LLC
HDM Construction LLC
2179 South 89th Street
New on HomeAdvisorNew on Angi
Approved Pro
HDM Construction LLC
2179 South 89th Street
New on AngiNew on HomeAdvisor
Approved Pro
977 local quotes requested
8 years of experience

We specialized in remodeling but also do new construction. We have a team of specialists in Drywall, mudding, taping, painting, and plumbing, installation of carpet, vinyl and tile. Installation of windows, interior and exterior doors.

We specialized in remodeling but also do new construction. We have a team of specialists in Drywall, mudding, taping, painting, and plumbing, installation of carpet, vinyl and tile. Installation of windows, interior and exterior doors.


Avatar for Moore Custom Solutions, LLC
Moore Custom Solutions, LLC
5.00(
16
)
Approved Pro
Moore Custom Solutions, LLC
5.00(
16
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
216 local quotes requested

We are a family-owned business and provide friendly, professional, and competitive remodeling services. With over 30 years of construction experience, a seasoned team of licensed and insured subcontractors, and a commitment to making the remodel experience fun and positive, we are a great choice for your residential or commercial project. Expect a prompt response to your inquiries, free estimates, and exceptional communication from our entire team. We also provide design services for those who need them.

"We worked with Moore Custom Solutions to finish our lower level. We are thrilled with how the project turned out! Shawn met with us and walked through all of our design options, had creative ideas, and gave us pricing options for many different types of finishes. When it came time to begin work on the project, his crew did excellent work and were polite and friendly. Throughout the entire process, Shawn responded to any questions or messages instantly. We always were kept aware of the game plan throughout the project. I would not hesitate to recommend Shawn and his team to anyone looking for a well done work at a reasonable price. If you choose Moore Custom Solutions for your project, I’m confident you will have a great experience."

Matt G on March 2025

We are a family-owned business and provide friendly, professional, and competitive remodeling services. With over 30 years of construction experience, a seasoned team of licensed and insured subcontractors, and a commitment to making the remodel experience fun and positive, we are a great choice for your residential or commercial project. Expect a prompt response to your inquiries, free estimates, and exceptional communication from our entire team. We also provide design services for those who need them.

"We worked with Moore Custom Solutions to finish our lower level. We are thrilled with how the project turned out! Shawn met with us and walked through all of our design options, had creative ideas, and gave us pricing options for many different types of finishes. When it came time to begin work on the project, his crew did excellent work and were polite and friendly. Throughout the entire process, Shawn responded to any questions or messages instantly. We always were kept aware of the game plan throughout the project. I would not hesitate to recommend Shawn and his team to anyone looking for a well done work at a reasonable price. If you choose Moore Custom Solutions for your project, I’m confident you will have a great experience."

Matt G on March 2025


Avatar for High Quality Contracting Inc
High Quality Contracting Inc
W208S8119 Hillendale Drive
4.74(
198
)
Approved Pro
High Quality Contracting Inc
W208S8119 Hillendale Drive
4.74(
198
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
1290 local quotes requested

**Call us today for your FREE ROOFING consultation!** For over 20 years, High Quality Contracting Inc has been a leading home contractor in southeastern Wisconsin. Our dedication to craftsmanship and quality has made us an A+ BBB accredited company and an Angie'sList Super Service Award recipient for decades. We focus on customer relationships to help not only build your dream home but to help build a history of trust you can count on when you need it most. We treat your home as if it were our own, ever conscious of the work we are doing and the impression we leave with you. High Quality Contracting Inc provides services in all forms of home improvement construction and building new homes from the ground up. We offer the following discounts which can not be combined with any other discount. Only one discount per customer per job. * We offer a 5% discount on labor for jobs over $2,500.00 for AngiesList subscribers. ( Must be claimed at the time of the consultation) * We offer a 5% discount on labor for Seniors. ( Must be claimed at the time of the consultation) * We offer a 10% Military discount on labor for active or veterans who show their DD214 at the time of the consultation. We offer one free consultation. We look forward to assisting you with your next project.

"High quality is exactly what we received when building our new home! Nick really made the whole process stress-free and enjoyable. He made sure to be available whenever and went above and beyond to make sure our dream home was perfect. We highly recommend Nick and his team!"

April H on December 2024

**Call us today for your FREE ROOFING consultation!** For over 20 years, High Quality Contracting Inc has been a leading home contractor in southeastern Wisconsin. Our dedication to craftsmanship and quality has made us an A+ BBB accredited company and an Angie'sList Super Service Award recipient for decades. We focus on customer relationships to help not only build your dream home but to help build a history of trust you can count on when you need it most. We treat your home as if it were our own, ever conscious of the work we are doing and the impression we leave with you. High Quality Contracting Inc provides services in all forms of home improvement construction and building new homes from the ground up. We offer the following discounts which can not be combined with any other discount. Only one discount per customer per job. * We offer a 5% discount on labor for jobs over $2,500.00 for AngiesList subscribers. ( Must be claimed at the time of the consultation) * We offer a 5% discount on labor for Seniors. ( Must be claimed at the time of the consultation) * We offer a 10% Military discount on labor for active or veterans who show their DD214 at the time of the consultation. We offer one free consultation. We look forward to assisting you with your next project.

"High quality is exactly what we received when building our new home! Nick really made the whole process stress-free and enjoyable. He made sure to be available whenever and went above and beyond to make sure our dream home was perfect. We highly recommend Nick and his team!"

April H on December 2024


C.J. Holmes Company, LLC
13500 Watertown Plank Rd
5.00(
6
)
Approved Pro
C.J. Holmes Company, LLC
13500 Watertown Plank Rd
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
342 local quotes requested

C.J. Holmes Company, LLC, has been in business for more than 40 years. From design to completion, we will assist you with all of your home renovation and remodeling needs. Call us today!

"Chet, Eduardo and Brandon took wonderful care of our home! The kitchen, floors, entryway, and bathrooms turned out better than we expected! The additional electric, heating, and plumbing teams were great to work with, too. Amazing how much our home has improved. Thanks so much, S and K"

Ken H on December 2024

C.J. Holmes Company, LLC, has been in business for more than 40 years. From design to completion, we will assist you with all of your home renovation and remodeling needs. Call us today!

"Chet, Eduardo and Brandon took wonderful care of our home! The kitchen, floors, entryway, and bathrooms turned out better than we expected! The additional electric, heating, and plumbing teams were great to work with, too. Amazing how much our home has improved. Thanks so much, S and K"

Ken H on December 2024


Avatar for Aqua Well & Pump Systems Inc
Aqua Well & Pump Systems Inc
124 N Oakridge Dr
4.59(
69
)
Approved Pro
Aqua Well & Pump Systems Inc
124 N Oakridge Dr
4.59(
69
)
Approved Pro
Customers say: True professional
77 local quotes requested
38 years of experience

Aqua Well & Pump Systems, Inc., is a 3rd generation; family owned & operated, well and pump service company, serving all of Southeastern Wisconsin. Our mission at Aqua is to provide our customers with a safe, reliable water supply, while safe guarding & promoting the protection of our most precious resource. To accomplish this mission, Aqua is dedicated to investing in promotion, equipment, & most of all people who share the same core values of knowledge, integrity, hard work, & honesty. Aqua provides pump & well drilling service for residential, industrial, commercial, & farm applications. services.

"Very patient and helpful"

Gregg A on February 2025

Aqua Well & Pump Systems, Inc., is a 3rd generation; family owned & operated, well and pump service company, serving all of Southeastern Wisconsin. Our mission at Aqua is to provide our customers with a safe, reliable water supply, while safe guarding & promoting the protection of our most precious resource. To accomplish this mission, Aqua is dedicated to investing in promotion, equipment, & most of all people who share the same core values of knowledge, integrity, hard work, & honesty. Aqua provides pump & well drilling service for residential, industrial, commercial, & farm applications. services.

"Very patient and helpful"

Gregg A on February 2025


Avatar for HAHN'S WATER WELL PUMP SERVICE INC
HAHN'S WATER WELL PUMP SERVICE INC
1366 E Sumner St
5.00(
19
)
Approved Pro
HAHN'S WATER WELL PUMP SERVICE INC
1366 E Sumner St
5.00(
19
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
40 local quotes requested

Looking for reliable well and pump services? Look no further! Hahn's Water Well Pump Service Inc is your trusted choice in Milwaukee. As a family owned and operated business, we prioritize quality and customer satisfaction. Contact us today for all your well and pump needs!

"Ben was very responsive, answering the phone every time we called (never went to voice-mail), showed up on time, completed the work in a timely manner and delivered results. We would highly recommend him."

Sue L on July 2022

Looking for reliable well and pump services? Look no further! Hahn's Water Well Pump Service Inc is your trusted choice in Milwaukee. As a family owned and operated business, we prioritize quality and customer satisfaction. Contact us today for all your well and pump needs!

"Ben was very responsive, answering the phone every time we called (never went to voice-mail), showed up on time, completed the work in a timely manner and delivered results. We would highly recommend him."

Sue L on July 2022


Avatar for Tairi Construction
Tairi Construction
7032 W Greenfield Ave
5.00(
5
)
Approved Pro
Tairi Construction
7032 W Greenfield Ave
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
836 local quotes requested

At Tairi Construction we stand with our customers. We strive to make your fantasies a reality, by specializing in all aspects of home remodeling. The services that we provide are: painting, hard wood and laminate flooring, complete kitchen and bathroom remodels, full Rec room remodel, tile work, and shower installs that will take as little as one day! For any and all inquiries please contact us at (414)376-7377

"Excellent work. Took the time to make sure the job was done perfect. Cleaned up every day"

Doug L on February 2023

At Tairi Construction we stand with our customers. We strive to make your fantasies a reality, by specializing in all aspects of home remodeling. The services that we provide are: painting, hard wood and laminate flooring, complete kitchen and bathroom remodels, full Rec room remodel, tile work, and shower installs that will take as little as one day! For any and all inquiries please contact us at (414)376-7377

"Excellent work. Took the time to make sure the job was done perfect. Cleaned up every day"

Doug L on February 2023

...
Showing 1-10 of 959

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.