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Top-Rated Tankless water heater installers in Hamilton - Updated Nov 2026

Avatar for J.Griffin Heating & Plumbing
J.Griffin Heating & Plumbing
4.9(
266
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"Jeff Griffin really knows heating & plumbing! He also recommended 2 excellent 3rd-party companies: 1. Unlimited Removal and Demolition - to drain, cut up, & remove old oil tank; abate asbestos from, and remove, old boiler; remove oil filler pipes & patch foundation with cement 2. Boxford Chimney Sweep - to run a new flue liner and install a new stainless steel chimney cap We hired J.Griffin Heating & Plumbing to disconnect an ancient "snowman-style" oil-fueled steam boiler with attached "instant" water heater, and replace it with a gas boiler & free-standing gas water heater. Fast. Efficient. Clean. Pleasant & willing to answer all of our questions. All 3 companies provided very high quality experiences! I would hire any/all of them again. Bonuses: Sandy Griffin (with JGH&P), & Daniela Ibanez (with UR&D) provided excellent & timely email & phone support. 5 Stars all around!!"
Navien
Medford Ma
Malden Ma
Saugus Ma
Andover Ma

+64

Response time11 hrs
3 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Christopher Viscarello Plumbing
Christopher Viscarello Plumbing
4.5(
72
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"I called Viscarello Plumbing and Heating when I had a leaking water heater. Chris looked at the job and recommended a very efficient tankless water heater. I decided to make the investment. Chris and crew installed my tankless. Now, showers never run cold-hot water on demand. I use less water- warms water up so much quicker in my 110y/o house. In July, with tankless system running sinks, shower and washer, my gas bill was $20! I also really like the way the tankless was mounted on the wall. We gained more space without the old water heater in the way. Best of all- nice neat work, no leaks and no mess. Since then, Viscarello Plumbing has plumbed my new kitchen, laundry room, replaced old pipes and replaced radiator valves. Rates are average-but work is above average."
High efficient boiler
High efficient boiler
High efficient boiler
High efficient boiler
High efficient tankless

+21

1 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Morris Heating & Air Conditioning
Morris Heating & Air Conditioning
4.8(
81
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Perfectly. Blaise was prompt, professional, and thought about ways to avoid additional issues. For example, because a different company had installed the unit, Blaise did not know what to expect regarding their workmanship, so he took precautions that saved us additional trouble and expense."
Additional Photos
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Additional Photos
Additional Photos

+8

4 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Comfort Professor
Comfort Professor
5.0(
24
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"I recently had a brand new HVAC system installed for both heating and cooling, and I couldn’t be happier with the experience. The team at Comfort Professor was extremely professional from start to finish. They worked efficiently, paid attention to every detail, and left everything spotless when the job was done. The cleanup was perfect, which I really appreciated. Highly recommend them if you’re looking for quality work and a smooth, hassle-free installation!"
10 neighbors recently requested a quote
Avatar for Borels Plumber Inc
Borels Plumber Inc
5.0(
11
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"These guys are great. Water heater broke and was leaking all over the cellar. They replaced my water heater and had everything done within a couple of hours. Highly recommend them and I will definitely use them again."
Water heater replacement
Water heater replacement
Bathroom remodeling
Bathroom remodeling
Kitchen remodeling

+4

Response time2 hrs
Response rate100%
Avatar for Heritage Home Service
Heritage Home Service
4.1(
1,316
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved (Corporate)

In business since 1988

Free estimates

Emergency services offered

"I asked for a rep to come to give quotes for repair or replacement of my gas boiler. Before he came the old boiler failed, and Heritage was able to quickly install a new one so that we without heat and hot water for only a short time."
Career fair
Team breakfast
Festivals and events
Golf tournament
Heritage Helps initiatives

+27

Recommended by91%of homeowners
Avatar for Maffei Plumbing and HVAC, LLC
Maffei Plumbing and HVAC, LLC
3.8(
12
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

Approved (Corporate)

In business since 2010

Free estimates

Emergency services offered

At Maffei Plumbing and HVAC, LLC, we are committed to your comfort. With an experienced and qualified staff to provide quick service for any service needed. We can solve any problem with a friendly face. Give us a call for a free estimate.

Air Conditioning Installation
Rinnai Tankless
Water Filtration
Heating Systems
Heating Systems

+6

Response time1 day
59 neighbors recently requested a quote
Recommended by12%of homeowners
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,405
)
Tankless Water Heater - Install

Serving Hamilton, MA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"We have had several Sila visits in recent months - all exceptional. VISIT 1: We had old pipes and valves that limited our dishwasher, so we had that replaced. While there, the Sila agent suggested we replace some of the attached lines and managed to streamline our hookups by removing some of the unneeded valves and connections no longer needed. VISIT 2: We similarly had a great visit and instal from David, who did a very beautiful install on our new water heater. He removed the broken unit, improved the connection design, put in improved valves and labelled each with a tag, then tagged other connections through the basement."
Additional Photos
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Additional Photos
Additional Photos
Additional Photos

+6

Response time2 days
Response rate100%
8 neighbors recently requested a quote
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