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TRUSTED BY MILLIS, MA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon115
    Verified water heater services reviews

Top-Rated Water heater pros in Millis - Updated Nov 2026

Avatar for S&S Piping and Heat LLC
S&S Piping and Heat LLC
5.0(
66
)
Water Heater - Install or ReplaceTankless Water Heater - InstallTankless Water Heater - Install - For Business+5 more

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Neo was excellent! My water heater went and a new one was installed by Neo and his team the next day. They were very professional, communicated instantly, and did a fantastic job. Will definitely use S.S Piping n Heat for all of my future plumbing and heating needs. Would recommend this company to anyone!"
Metro Construction Design
Metro Construction Design
Metro Construction Design
Metro Construction Design
Metro Construction Design

+53

Response time1 day
Response rate100%
11 neighbors recently requested a quote
Avatar for Reservoir Home LLC
Reservoir Home LLC
4.8(
14
)
Water Heater - Install or Replace

Serving Millis, MA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Our mission is to make home electrification easy, affordable and awesome. We turn your water heater into a thermal battery. A Reservoir puts a heat pump, an onboard computer and industrial hydronic controls in one unit. It heats and stores water when electricity is cheapest and cleanest and holds it until your house needs it. \n

Reservoir Installs
Reservoir Installs
Reservoir Installs
Reservoir Installs
Reservoir Installs

+5

31 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Gentille Plumbing and Heating
Gentille Plumbing and Heating
5.0(
28
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"My grandson flushed his little yellow bus down the toilet Friday afternoon. I called several plumbers in the area. By late Saturday afternoon I had only 1 returned call saying they could come out Monday morning. A friend suggested I call Gentille Plumbing and Heating. I called them and they said they could come early Sunday morning. Ryan arrived promptly as promise and quickly determine how to approach the issue and retrieved the little yellow bus. Cleanup was quick and pricing fair. Ryan was professional , friendly and was on his way within 45 minutes of arrival. Thank You Gentille Plumbing and Heating"
Response time6 hrs
Response rate96%
23 neighbors recently requested a quote
Avatar for Comfort Professor
Comfort Professor
5.0(
24
)
Tankless Water Heater - InstallTankless Water Heater - RepairWater Heater - Install or Replace+1 more

Serving Millis, 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 Pro Comfort Control LLC
Pro Comfort Control LLC
5.0(
25
)
Water Heater - Install or Replace

Serving Millis, MA and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"We contacted Pro Comfort Control to bid on the installation of a ductless mini-split in our sunroom. With many companies the person who shows up is essentially a salesperson and isn't as knowledgeable about the systems and the intricates of installing them...not so with Ryan. He was able to answer every question and explain why he was answering in a specific way related to the individual peculiarities of our house. The quote was very competitive and they use great equipment and materials. The Office Manager Alex was easy to work with in regards to scheduling and any additional questions. Installation was great and as an added bonus they smelled gas in the crawlspace while installing the lines and quickly replaced a corroded propane line for our hot water heater. You will not find a better partner for all your home cooling and heating needs."
Outdoor Heat Pump
Charging it all up!
Gas Boiler
Ductless Mini-split
Ductless indoor unit

+51

1 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
522
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Millis, MA and surrounding areas

Approved

In business since 1928

Emergency services offered

Warranties offered

"Not easy finding an HVAC company willing to install a gas steam boiler. These guys did it all and did it well, removing the old oil burner and oil tank, installing a Weil McClain boiler including steam piping and hot water, installing gas piping, electrical and plumbing, including all inspections, even leaving me a temporary hot water heater until the furnace installation was completed. They fully accommodated my schedule as well. The town electrical inspector who came after installation was complete confirmed their good reputation."
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Additional Photos
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27 neighbors recently requested a quote
Recommended by86%of homeowners
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Water Heaters FAQs, answered by experts

Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

Gas water heaters last between eight and 12 years on average. You can help them reach their maximum lifespan with regular cleanings, maintenance, and professional checkups, though don’t hesitate to swing for a full replacement if the total cost of repairs is greater than that of purchasing and installing a new unit. 

In most municipalities, a license is not mandatory for water heater installation or replacement. However, we strongly recommend hiring a licensed plumber or water heater installer to handle the work. Licensed installers are far less likely to make a mistake during the installation, which means paying for the experience decreases your risk of a leak and other issues. You can use our state licensing tool to find out if a contractor you’re considering in your area holds a plumber’s license.

You can and should vent the gas from your hot water heater to the outside of your home. Traditionally, these gases were vented back to other gas appliances, like stoves or furnaces, but many jurisdictions have outlawed this practice due to the risks it provides. 

Most water heaters today use atmospheric venting that exhausts the gas out of the home through a pipe.

The amount of time it takes to replace an electric water heater will depend on the skill level of the individual who is replacing it. For example, if you replace it yourself–and you don’t have much experience–you can expect the project to take a full day. 

However, if you have a certified plumber or water heater contractor install your new water heater, it can take as little as 2 to 3 hours.

The Millis, MA homeowners’ guide to water heater services

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