Top-rated tankless water heater installers.

Get matched with top tankless water heater installers in Norwalk, CT

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.

Find Tankless water heater installers in Norwalk

Avatar for Roto-Rooter Plumbing & Water Cleanup

Roto-Rooter Plumbing & Water Cleanup

4.14(
171
)
Approved Pro

Roto-Rooter Plumbing & Water Cleanup

4.14(
171
)
Approved Pro
Customers say: Quick response
91 years of experience
Free onsite estimate

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"They were a day late"

Tina D on August 2025

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"They were a day late"

Tina D on August 2025


Avatar for Mr. Rooter of Southern Fairfield  County

Mr. Rooter of Southern Fairfield County

4.57(
178
)
Approved Pro

Mr. Rooter of Southern Fairfield County

4.57(
178
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
13 years of experience

The plumbing service experts at Mr. Rooter of Southern Fairfield County are honest and ethical, and provide exceptional drain cleaning and plumbing services. Our customers know that Mr. Rooter plumbers will do the job right the first time and treat their entire home or business with the respect and care it deserves. A plumbing emergency is one of the most stressful and disruptive events a homeowner experiences. We offer a 24-hour solution for your residential and commercial properties. We work extremely hard to deliver the highest level of customer service is our number 1 priority. We also understand that actions speak louder than words, so we encourage you to visit Customer Testimonials to get a better picture of our customer service record. Ask us a question, or get in touch with an expert plumbing technician 24 hours a day, seven days a week.

"Job as oer promised and specifications"

Jay A on September 2023

The plumbing service experts at Mr. Rooter of Southern Fairfield County are honest and ethical, and provide exceptional drain cleaning and plumbing services. Our customers know that Mr. Rooter plumbers will do the job right the first time and treat their entire home or business with the respect and care it deserves. A plumbing emergency is one of the most stressful and disruptive events a homeowner experiences. We offer a 24-hour solution for your residential and commercial properties. We work extremely hard to deliver the highest level of customer service is our number 1 priority. We also understand that actions speak louder than words, so we encourage you to visit Customer Testimonials to get a better picture of our customer service record. Ask us a question, or get in touch with an expert plumbing technician 24 hours a day, seven days a week.

"Job as oer promised and specifications"

Jay A on September 2023


Avatar for All Weather Heating & Cooling

All Weather Heating & Cooling

4.82(
55
)
Approved Pro

All Weather Heating & Cooling

4.82(
55
)
Approved Pro
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
57 years of experience

All Weather Heating & Cooling has been serving Nassau & Suffolk County of Long Island since 1969. We are now celebrating 56 years of exceeding customer expectations. All Weather provides sales, installation, service and maintenance of residential and commercial heating, air conditioning & water filtration systems.

"They installed a minisplit cooling system, with 3 exchanges June 2021. Since then it is not operating the way it should. In my bedroom with the door closed at night on cool at 70 degrees the humidity goes up to 80%. I wake up uncomfortable, change it from cool to dry mode. The humidity will go down into the 50% range but the temperature drops down to 62 or less! So in cool or dry mode I can't get a good nights sleep! They come and look at it and tell me everything is fine. I'm going to buy a window air conditioner tomorrow which seems insane because i spent $10,000 on this minisplit AC system!"

JIM G on June 2023

All Weather Heating & Cooling has been serving Nassau & Suffolk County of Long Island since 1969. We are now celebrating 56 years of exceeding customer expectations. All Weather provides sales, installation, service and maintenance of residential and commercial heating, air conditioning & water filtration systems.

"They installed a minisplit cooling system, with 3 exchanges June 2021. Since then it is not operating the way it should. In my bedroom with the door closed at night on cool at 70 degrees the humidity goes up to 80%. I wake up uncomfortable, change it from cool to dry mode. The humidity will go down into the 50% range but the temperature drops down to 62 or less! So in cool or dry mode I can't get a good nights sleep! They come and look at it and tell me everything is fine. I'm going to buy a window air conditioner tomorrow which seems insane because i spent $10,000 on this minisplit AC system!"

JIM G on June 2023


Avatar for Celco Heating & Air Conditioning

Celco Heating & Air Conditioning

4.78(
103
)
Approved Pro

Celco Heating & Air Conditioning

4.78(
103
)
Approved Pro
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
21 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 Sila Heating, Cooling and Plumbing

Sila Heating, Cooling and Plumbing

4.49(
856
)
Approved Pro

Sila Heating, Cooling and Plumbing

4.49(
856
)
Approved Pro
Customers say: Super punctual
53 local quotes requested
37 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Did a great job"

susan s on March 2025

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Did a great job"

susan s on March 2025


Avatar for Universe Home Services

Universe Home Services

4.73(
402
)
Approved Pro

Universe Home Services

4.73(
402
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
12 local quotes requested

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!

"Technician was excellent, did come around 10 PM and was a little pricey."

Hugh L on February 2026

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!

"Technician was excellent, did come around 10 PM and was a little pricey."

Hugh L on February 2026


4th Ave Heating & Cooling

No reviews yet

4th Ave Heating & Cooling

No reviews yet
Emergency services offered

Our plumbers are capable of replacing, supplying, and installing any plumbing appliance and its interior such as toilets, showers, tubs, sinks, faucets, etc. We clear small to large drains and main sewer lines, repair pipes, and water heaters, and install new lines. Our heating technicians are capable of repairing, replacing, and installing any heating unit and appliance such as water heaters, boilers, furnaces, radiators and stoves. We do oil to gas conversions, run gas lines, and adjust gas pressure. Our technicians are fully capable of repairing, installing, and maintenance of HVAC split systems, central air units, compressors, and trane units. We will keep your home or business cool for the entire summer and summers to come.

Our plumbers are capable of replacing, supplying, and installing any plumbing appliance and its interior such as toilets, showers, tubs, sinks, faucets, etc. We clear small to large drains and main sewer lines, repair pipes, and water heaters, and install new lines. Our heating technicians are capable of repairing, replacing, and installing any heating unit and appliance such as water heaters, boilers, furnaces, radiators and stoves. We do oil to gas conversions, run gas lines, and adjust gas pressure. Our technicians are fully capable of repairing, installing, and maintenance of HVAC split systems, central air units, compressors, and trane units. We will keep your home or business cool for the entire summer and summers to come.


Avatar for Elizabeth Appliance Repair

Elizabeth Appliance Repair

No reviews yet

Elizabeth Appliance Repair

No reviews yet
26 years of experience

Elizabeth Appliance Repair has been receiving enormous and continuous support from clients who keep on trusting our appliance service. We gained their trust because the quality of every job we do, may it be repair, maintenance or installation, is always of top quality. It’s also timely and the cost is fair.

Elizabeth Appliance Repair has been receiving enormous and continuous support from clients who keep on trusting our appliance service. We gained their trust because the quality of every job we do, may it be repair, maintenance or installation, is always of top quality. It’s also timely and the cost is fair.


Avatar for Servcon LLC

Servcon LLC

5.00(
3
)

Servcon LLC

5.00(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Since 2000, Servcon has been the local leading service provider for Fairfield County, including Stamford and surrounding areas, when it comes to heating, air conditioning and indoor air quality. They are dedicated to offering local residential clients the best in services that will improve their comfort, as well as their quality of life. Their unsurpassed customer service and quality workmanship is what has helped them earn the impeccable reputation that they have. Services - Fairfield County Heating, Fairfield County Air Conditioning, Heating Repairs, Heating Installation, Heating Tune-Up, Furnace Repairs, Furnace Replacement, Boiler Repairs, Air Conditioning Installations, Air Conditioning Repairs, Air Conditioning Tune-Up, Emergency AC Service, Air Cleaners, Humidifiers, Duct Cleaning, Service Agreements / Comfort Club, Wine Cellar Climate Control, Special Needs, Home Safety, Energy Savings Service Area - Greenwich, CT, Stamford, CT, Norwalk, CT, Westport, CT, Fairfield, CT, Southport, CT, Wilton, CT

Since 2000, Servcon has been the local leading service provider for Fairfield County, including Stamford and surrounding areas, when it comes to heating, air conditioning and indoor air quality. They are dedicated to offering local residential clients the best in services that will improve their comfort, as well as their quality of life. Their unsurpassed customer service and quality workmanship is what has helped them earn the impeccable reputation that they have. Services - Fairfield County Heating, Fairfield County Air Conditioning, Heating Repairs, Heating Installation, Heating Tune-Up, Furnace Repairs, Furnace Replacement, Boiler Repairs, Air Conditioning Installations, Air Conditioning Repairs, Air Conditioning Tune-Up, Emergency AC Service, Air Cleaners, Humidifiers, Duct Cleaning, Service Agreements / Comfort Club, Wine Cellar Climate Control, Special Needs, Home Safety, Energy Savings Service Area - Greenwich, CT, Stamford, CT, Norwalk, CT, Westport, CT, Fairfield, CT, Southport, CT, Wilton, CT


BQ Sewer

No reviews yet

BQ Sewer

No reviews yet
Free onsite estimate

sewer and drain cleaning

sewer and drain cleaning

...
Showing 1-10 of 1009

The Norwalk, CT homeowners’ guide to tankless water heater installations

From average costs to expert advice, get all the answers you need to get your job done.