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Tankless water heater installers in South Casco

Customized Plumbing and Heating
92 Puritan Drive
4.66(
238
)
•
Approved Pro
Customized Plumbing and Heating
92 Puritan Drive
4.66(
238
)
•
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
16 local quotes requested

Customized Plumbing and Heating believes that the customer comes first. No matter what you need from toilets to fixtures and everything in between. With an unparalleled attention to detail we will assure you that your project will be completed on time and within budget. With over a decade of professional experience and expertise behind us, you can count on us to treat you right. We appreciate your referral business and look forward to working with you soon. Remember, we fix where you go!

"Amazing experience. Will definitely work with again!"

Ceren P on May 2024

Customized Plumbing and Heating believes that the customer comes first. No matter what you need from toilets to fixtures and everything in between. With an unparalleled attention to detail we will assure you that your project will be completed on time and within budget. With over a decade of professional experience and expertise behind us, you can count on us to treat you right. We appreciate your referral business and look forward to working with you soon. Remember, we fix where you go!

"Amazing experience. Will definitely work with again!"

Ceren P on May 2024


Avatar for Big Wave Plumbing & Gas, LLC
Big Wave Plumbing & Gas, LLC
526 Summit St
5.00(
8
)
•
Approved Pro
Big Wave Plumbing & Gas, LLC
526 Summit St
5.00(
8
)
•
Approved Pro
3 years of experience
Free onsite estimate

BIG WAVE PLUMBING & GAS, LLC we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumerÂ’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.

"Elliot was kind, courteous, professional and extraordinarily helpful. In his initial visit he looked at the damage, and the surrounding area, and provided me with multiple options to correct the problem. He had researched Reverse Osmosis systems, and discussed a newer product that was infinately superior to my current system. He recommended updates to piping as I have an older home, and some older installations did not meet current code requirements. I found Eliot to me very knowledgable, prompt and trustworthy....I Highly recommend him!!!!"

Elizabeth P on March 2025

BIG WAVE PLUMBING & GAS, LLC we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumerÂ’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.

"Elliot was kind, courteous, professional and extraordinarily helpful. In his initial visit he looked at the damage, and the surrounding area, and provided me with multiple options to correct the problem. He had researched Reverse Osmosis systems, and discussed a newer product that was infinately superior to my current system. He recommended updates to piping as I have an older home, and some older installations did not meet current code requirements. I found Eliot to me very knowledgable, prompt and trustworthy....I Highly recommend him!!!!"

Elizabeth P on March 2025


Avatar for Randy Marquis Well and Pump
Randy Marquis Well and Pump
1 Alpine Dr.
4.91(
44
)
•
Approved Pro
Randy Marquis Well and Pump
1 Alpine Dr.
4.91(
44
)
•
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
57 local quotes requested

Marquis Well & Pump is a complete water service company. We install and service water pump systems, softeners, all types water filtration, well drilling, and geothermal. We also provide these services: water testing, well inspections including pump testing, water pump system inspections, and filtration system inspections. If you have a problem with your water call "We have the Solution".

"Happy to report 5 star service! Very responsive, knowledgeable and helpful. Educated us about our new home and its systems, as well as diagnosing the next steps to resolve our problems. Left us smiling!! Would highly recommend to others and would call on Marquis again."

Leslie D on August 2022

Marquis Well & Pump is a complete water service company. We install and service water pump systems, softeners, all types water filtration, well drilling, and geothermal. We also provide these services: water testing, well inspections including pump testing, water pump system inspections, and filtration system inspections. If you have a problem with your water call "We have the Solution".

"Happy to report 5 star service! Very responsive, knowledgeable and helpful. Educated us about our new home and its systems, as well as diagnosing the next steps to resolve our problems. Left us smiling!! Would highly recommend to others and would call on Marquis again."

Leslie D on August 2022


Woodville Plumbing and Heating
7 Woodmere Rd
4.33(
12
)
•
Approved Pro
Woodville Plumbing and Heating
7 Woodmere Rd
4.33(
12
)
•
Approved Pro
Customers say: Quality work
115 local quotes requested
8 years of experience

Plumbing services | Plumbing repair | Water heater replacement | Water heater installation | Drain cleaning services | Clogged drain | Boiler installation

"Rob was great! Excellent communication and follow up."

Danny L on November 2024

Plumbing services | Plumbing repair | Water heater replacement | Water heater installation | Drain cleaning services | Clogged drain | Boiler installation

"Rob was great! Excellent communication and follow up."

Danny L on November 2024


Avatar for Long Home Products
Long Home Products
30 Centre Rd
New on HomeAdvisorNew on Angi•
Approved Pro
Long Home Products
30 Centre Rd
New on AngiNew on HomeAdvisor•
Approved Pro
1979 local quotes requested
80 years of experience

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!

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!


Avatar for My Dream Bathroom Co
My Dream Bathroom Co
Po Box 4768
5.00(
14
)
•
Approved Pro
My Dream Bathroom Co
Po Box 4768
5.00(
14
)
•
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
252 local quotes requested

Jev, the owner of Maine House Painting, has over 20 years experience with house/building painting and property maintenance. With a solid background in engineering and project management, Jev brings a high level of expertise and attention to detail. If you are looking for a high quality painting job, call Jev. He will do a better job at a more reasonable price.

"Jev, Richie, and Emily were all professional, and efficient. This bathroom was an old 70's bathroom with tile on the walls. We weren't sure what Jev would find, but he communicated with us every step of the way. He did a beautiful job. I would recommend him."

Mary H on March 2025

Jev, the owner of Maine House Painting, has over 20 years experience with house/building painting and property maintenance. With a solid background in engineering and project management, Jev brings a high level of expertise and attention to detail. If you are looking for a high quality painting job, call Jev. He will do a better job at a more reasonable price.

"Jev, Richie, and Emily were all professional, and efficient. This bathroom was an old 70's bathroom with tile on the walls. We weren't sure what Jev would find, but he communicated with us every step of the way. He did a beautiful job. I would recommend him."

Mary H on March 2025


Avatar for Maine Home Renovations
Maine Home Renovations
Portland
5.00(
1
)
•
Approved Pro
Maine Home Renovations
Portland
5.00(
1
)
•
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
214 local quotes requested

We're so glad you found us! If you're here, you're thinking about giving your home an update.😀 Well... you're in the right place because that's what we do! We are fully insured for your peace of mind, and we specialize in a wide range of interior and exterior services. We take pride in being a close-knit, family-oriented, honest, and professional team, and we are here to help! Even small improvements can make a BIG difference. Whether your home feels outdated and needs some TLC or you're planning a complete renovation, structural repairs, or water damage restoration, our goal is to make the entire process as stress-free and smooth as possible for you. Let's connect to schedule an in-person meeting to get started on your estimate. If you have any questions or need more information, we're here and happy to help! Contact us via phone, email, or by filling out the Project Details Form on our website: www.mainehomerenovations.com We look forward to hearing from you!

"The remodel included laying a new floor and baseboard. Removing countertops and replacing lights, sinks and fixtures. The remodel involved carpentry, plumbing and electrical wiring. The contractor was able to complete all of this without hiring subcontractors resulting in a quick completion."

julie c on March 2025

We're so glad you found us! If you're here, you're thinking about giving your home an update.😀 Well... you're in the right place because that's what we do! We are fully insured for your peace of mind, and we specialize in a wide range of interior and exterior services. We take pride in being a close-knit, family-oriented, honest, and professional team, and we are here to help! Even small improvements can make a BIG difference. Whether your home feels outdated and needs some TLC or you're planning a complete renovation, structural repairs, or water damage restoration, our goal is to make the entire process as stress-free and smooth as possible for you. Let's connect to schedule an in-person meeting to get started on your estimate. If you have any questions or need more information, we're here and happy to help! Contact us via phone, email, or by filling out the Project Details Form on our website: www.mainehomerenovations.com We look forward to hearing from you!

"The remodel included laying a new floor and baseboard. Removing countertops and replacing lights, sinks and fixtures. The remodel involved carpentry, plumbing and electrical wiring. The contractor was able to complete all of this without hiring subcontractors resulting in a quick completion."

julie c on March 2025


Avatar for Bellevue Construction Company
Bellevue Construction Company
Summer Ct
4.94(
17
)
•
Approved Pro
Bellevue Construction Company
Summer Ct
4.94(
17
)
•
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
826 local quotes requested

Bellevue Construction Company delivers a superior finished product. We specialize in all areas of construction. We aim to serve all of our customers with a wonderful experience.  Our motto is quality over quantity.  Our company has been owned and operating for 7+ years!  Give us a call or click to request a free quote today.  Feel free to text or call this #7816706394

"Good, reliable workers. Communication was good too. Neat and respectful. Job well done."

Mary K on March 2025

Bellevue Construction Company delivers a superior finished product. We specialize in all areas of construction. We aim to serve all of our customers with a wonderful experience.  Our motto is quality over quantity.  Our company has been owned and operating for 7+ years!  Give us a call or click to request a free quote today.  Feel free to text or call this #7816706394

"Good, reliable workers. Communication was good too. Neat and respectful. Job well done."

Mary K on March 2025


Avatar for Aire Serv of Southern Maine
Aire Serv of Southern Maine
-
4.54(
37
)
•
Approved Pro
Aire Serv of Southern Maine
-
4.54(
37
)
•
Approved Pro
Customers say: Super punctual
368 local quotes requested
24 years of experience

Indoor Air Quality, Heating, Air Conditioning and Indoor Air Quality Products, and Commercial Services for your business. Our Exclusive Written Guarantees Are Designed to Protect You and Your Home Request a free home estimate, Design your own heating and cooling system, Shop for filters or accessories online, Request an In-Home Aire Quality Survey .

"Total Ripoff! My boiler stopped working the other day and my usual company was unable to come out due to being short-staffed that day. I resorted to google and unfortunately came across Aire Serv. Their technician (who was very nice) came out to assess the situation and determined it was caused by a damaged pilot assembly. After calling around for replacement parts, I was told that the parts were out of stock until later in the week. Despite this, I was still charged $234 for the trip fee and diagnostic fee. I was then quoted $1112 for the repairs to be done once the parts were in. I shared this quote with my normal company and they were appalled! Thankfully they fixed the issue for less than half the price Aire Serv was going to charge me! PLEASE do not use this money-grubbing company, and instead use a local independent company if you need heating work done!"

Brian F on March 2025

Indoor Air Quality, Heating, Air Conditioning and Indoor Air Quality Products, and Commercial Services for your business. Our Exclusive Written Guarantees Are Designed to Protect You and Your Home Request a free home estimate, Design your own heating and cooling system, Shop for filters or accessories online, Request an In-Home Aire Quality Survey .

"Total Ripoff! My boiler stopped working the other day and my usual company was unable to come out due to being short-staffed that day. I resorted to google and unfortunately came across Aire Serv. Their technician (who was very nice) came out to assess the situation and determined it was caused by a damaged pilot assembly. After calling around for replacement parts, I was told that the parts were out of stock until later in the week. Despite this, I was still charged $234 for the trip fee and diagnostic fee. I was then quoted $1112 for the repairs to be done once the parts were in. I shared this quote with my normal company and they were appalled! Thankfully they fixed the issue for less than half the price Aire Serv was going to charge me! PLEASE do not use this money-grubbing company, and instead use a local independent company if you need heating work done!"

Brian F on March 2025


Avatar for East Coast Vinyl LLC
East Coast Vinyl LLC
18 Prospect St
4.67(
6
)
•
Approved Pro
East Coast Vinyl LLC
18 Prospect St
4.67(
6
)
•
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
454 local quotes requested

we are exterior remodeling specialist!! we focus on home restorations and Updates we specialize in VINYL SIDING with Azec trim. we Install NEW WINDOWS and REPLACEMENT WINDOWS. ASK US ABOUT?? FREE GUTTERS I have 30+ yrs experience in home remodeling and repair. I build decks kitchens bathrooms ceramic tile work and so on.

"David was wonderful, he was great at explaining his process and the overall time for the project. I would/will be hiring him again in the future."

Andrew L on March 2025

we are exterior remodeling specialist!! we focus on home restorations and Updates we specialize in VINYL SIDING with Azec trim. we Install NEW WINDOWS and REPLACEMENT WINDOWS. ASK US ABOUT?? FREE GUTTERS I have 30+ yrs experience in home remodeling and repair. I build decks kitchens bathrooms ceramic tile work and so on.

"David was wonderful, he was great at explaining his process and the overall time for the project. I would/will be hiring him again in the future."

Andrew L on March 2025

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Showing 1-10 of 425

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.
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