Get matched with top boiler installation pros in Millis, MA

Millis homeowners rate boiler installation pros in our network

4.5

(1.4k reviews)

Top-rated boiler installation pros.

Find Boiler installation pros in Millis

Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,397
)

Serving Millis, MA and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"We needed our boiler replaced and had multiple companies come and look at the job. We ended up selecting Sila as we read good reviews on the company. Sila surpassed our expectations. The tech who performed the install (Gage) was on time, communicated the entire process to us from start to finish and did a tremendous job. He also made sure to clean up afterwards and was very professional. We would absolutely hire Sila again!"
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+6

Response time2 days
63 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for H L Bowman
H L Bowman
4.7(
407
)

Serving Millis, MA and surrounding areas

Approved (Corporate)

In business since 1946

Free estimates

Emergency services offered

"The thermocouple on my gas-fired boiler needed to be replaced, and the pilot needed to be cleaned. The tech was helpful and forthcoming with information. Took about an hour, as my boiler does not have easy access. Would hire again!"
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+6

552 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for David M. Clay Plumbing& Heating
David M. Clay Plumbing& Heating
4.1(
175
)

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Credit card accepted

Customers say: True professional

"David does great work—I’ve used Clay Plumbing for two boiler replacement jobs; he is reliable, works quickly and efficiently, at very reasonable cost. Good to know he’s there!"
Plumbing Project
On demand waters for nail salon
Plumbing Project
Installed 6 new wall mounted gas water boilers 96 Afue
Converted a old fire station to a residential home and this is one of the bathroom we installed

+21

Response time1 day
Response rate90%
14 neighbors recently requested a quote
Avatar for Cotti-Johnson Heating-Cooling-Electrical
Cotti-Johnson Heating-Cooling-Electrical
4.7(
165
)

Serving Millis, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1948

Free estimates

Emergency services offered

"Came in to install a new faucet and trap in the bathroom. On time, polite, and courteous. There was a slight leak in one of the flex lines. Came back the next day and rectified the problem. A good experience."
Navien Install
Backflow
Outdoor Shower
Well Tank Replacement
Filtration Installation

+62

Response time10 hrs
70 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
521
)

Serving Millis, MA and surrounding areas

Approved

In business since 1928

Emergency services offered

Warranties offered

"I originally called the company that did my regular maintenance less than a year ago. They told me they couldn't send someone out for 3 days! This in the middle of a cold snap. When I called Rodenhiser, they were able to send someone the next day. While they were not able to completely fix the problem right away - a part was needed - they were able to restore heat while we waited for the part. They came back in a few days and repaired the boiler zone controller."
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57 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for G&C Plumbing and Heating, LLC
G&C Plumbing and Heating, LLC
5.0(
91
)

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Small jobs welcome

Credit card accepted

"My gas boiler wasn?t working and I called G&C Plumbing. They answered the phone right away and had a tech out within an hour. The techs were very knowledgeable and friendly. They did an amazing job taking care of my issue! I would highly recommend them!"
Burnham X2 Boiler
Water Heater Upgrade
Water Heater Upgrade
Water Heater Upgrade
Water Heater Upgrade

+14

Response time5 hrs
Response rate98%
3 neighbors recently requested a quote
M.A. Paone Plumbing & Heating
4.5(
473
)

Serving Millis, MA and surrounding areas

Approved

In business since 1987

Free estimates

Credit card accepted

"I consider myself super lucky to have had Mike install our water heater, and then subsequently a gas boiler with indirect water heater. He truly IS a master plumber, that boiler looked like a piece of art at the end of installation, and it works like a charm! In addition he did quite a bit of plumbing by moving around a second water heater, to save us some room in the basement - free of charge! Not only is he an outstanding and extremely hard working plumber (you can judge from the number of reviews!), but also a deeply decent man of exceptional integrity, truly an inspiration to all of us..."
Response time7 hrs
Response rate96%
86 neighbors recently requested a quote
Avatar for Pro Comfort Control LLC
Pro Comfort Control LLC
5.0(
25
)

Serving Millis, MA and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"Ryan is amazing. He is knowledgeable, personable, and passionate about the job. He replaced our oil boiler and converted us to a new high efficiency gas boiler. He even painted the wall the boiler hung on and ran everything through the basement ceiling since we’re planning to finish the basement. He made sure to get the job completed on schedule, so we did not run out of oil and had a smooth transition to propane. Ryan also installed a new water heater and new Ductless Mini split AC system. Each day he was here he was easy to talk to and even had the patience for our three year old being super interested in him. He was easy to get in touch with and always kept us posted on the project. He responded quickly to texts and explained everything he did when the project was completed. He is meticulous about his work and cares about the end result. Looking forward to having Ryan back for the other jobs we need completed!"
Outdoor Heat Pump
Charging it all up!
Gas Boiler
Ductless Mini-split
Ductless indoor unit

+51

2 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for Gentille Plumbing and Heating
Gentille Plumbing and Heating
5.0(
26
)

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"I had the pleasure of working with Gentille Plumbing for a full renovation of my home, and I couldn’t be more satisfied with the results. He handled everything — water, gas, and sewer — with the highest level of expertise and professionalism. From start to finish, he was punctual, respectful, and incredibly detail-oriented. Every aspect of the plumbing installation was done efficiently and with great care. He communicated clearly throughout the project, kept the worksite tidy, and ensured that everything met code and functioned flawlessly. It’s rare to find tradespeople who combine technical skill with such a strong work ethic and reliability. Gentille Plumbing delivered top-notch service, and I would highly recommend Him to anyone needing quality plumbing work — whether it’s a renovation, new construction, or repairs. Thank you, Gentille Plumbing, for a job extremely well done!"
Response time6 hrs
Response rate94%
1 neighbors recently requested a quote
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FAQs for boiler installation projects in Millis, MA

The average cost to install a new water heater is around $1,300, but you can expect to pay between $875 and $1,750, depending on the kind of water heater, the size of the unit, and the professional chosen to complete the work. Tankless water heaters can push your price higher, as installation is more complicated, with prices as high as $3,500. The location and accessibility of your water heater will play a role in the project cost, as those sitting in tight spaces like a crawl space will drive up your labor costs.

Yes, most states require plumbers to be licensed, and for good reason. Hiring an unlicensed plumber could lead to poor quality work, costly future expenses, and potential code violations. 

As you browse our pro listings, take note of the “Angi Approved” badge. Angi Approved businesses meet our standards for certification which include: 

  • The owner, principal, or relevant manager passed a criminal background check

  • Required to have applicable state and local licenses

  • Maintain an average star rating of 3.0 or better on our network, if they have at least one review

  • Paying to advertise their services

  • Meeting any other eligibility criteria required by Angi

Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.

It usually takes a professional water heater installer between two and three hours to remove an existing water heater and install a new tank heater. However, it could take four to five hours if they have to work in a small utility closet or another tight area, like a crawl space. Tankless water heaters have a more complicated installation process, so they will take a bit longer. Additionally, a gas water heater requires a connection to a gas line, and that alone can add about an hour to the installation timeline compared to installing an electric water heater.

It is very difficult and dangerous to install your own water heater, so we strongly recommend against tackling this as a DIY project. Not only will you need to wire your water heater, but you’ll also need to connect plumbing to the intake and outlet. Sweating copper pipes and connecting wiring properly are skills most DIYers don’t have, and even if you do feel confident you can do it, working with water and electricity always leaves the potential for electrocution. Hiring a local water heater installer is well worth the investment.

The average cost to hire a plumber is around $100 an hour but can vary between $45 and $200 an hour depending on the plumber’s experience and the repair that you need. It’s also important to note that these prices can go up on holidays, and emergency plumber rates average $150 per hour, in addition to a flat-rate trip fee of $100 to $350

The Millis, MA homeowners’ guide to boiler installation services

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