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

Wanda's Water Heaters
4.9(
12
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Credit card accepted

"Wanda?s is awesome! My old electric hot water heater tank finally retired to the recycling bin. I called on Tuesday evening and spoke to a knowledgeable technician named Chad. I told him what my old unit was doing and he said it definitely needs a replacement after 17 years. He then asked how the home is heated. And then gave me the 2 options for my home. He patiently explained the differences between the hybrid heat pump unit vs the electric one that was presently on its way out. He answered all my newbie questions. He explained the pricing between the two units. I told him I have to discuss everything with the cfo and I would call back Wednesday morning. He also told me they would get me on the schedule for tomorrow or the next day. That was amazing. I called the next day and spoke with Amanda to schedule me in the following day. Chad showed up the following morning and did an awesome job. He was very polite and knew his job well. I am very satisfied so far with Wanda?s."
Installation of boiler
Response time1 day
2 neighbors recently requested a quote
Recommended by8%of homeowners
Avatar for Bourne Family Plumbing, LLC
Bourne Family Plumbing, LLC
4.8(
13
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Approved

Free estimates

Credit card accepted

"Colin Bourne is a pleasant person who we asked for a quote for replacing the water heater expansion tank. We accepted and he arrived on time and had the job done in les than an hour. We're very pleased and plan on using him again for our next plumbing problem."
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+14

3 neighbors recently requested a quote
Avatar for Barrington Solutions Plumbing & Heating LLC
Barrington Solutions Plumbing & Heating LLC
4.9(
17
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Approved

In business since 2024

Free estimates

Small jobs welcome

"I finally got to build my dream garage to store all my tools and have a cool hangout on Friday nights with the boys n a couple coors. Chris came and did everything from the bathroom and the heating system. I will definitely be calling him back to add a mini split in the future. He was professional, punctual and clean. Very knowledgeable you can tell he cares about his clients."
Granite Ridge
Brook hill development
Sanborton
Derry
2.5 bathroom modular

+39

41 neighbors recently requested a quote
Avatar for Heritage Home Service
Heritage Home Service
4.2(
1,356
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Approved (Corporate)

In business since 1988

Emergency services offered

Warranties 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."
Golf Tournament
Water quality team
HVAC tech
Electrical team
Bryan, electrician

+24

129 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
3.7(
43
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"My only complaint was when I made the call I was not told that there was a service fee - that is not right! The guys that installed the water heater were great and left no mess - they get 5 stars â­ ï¸"
Rinnai install
Designer shower
Drain line
Showroom shower/tub stall
Faucet fixtures

+2

Response time10 hrs
Response rate98%
9 neighbors recently requested a quote
Avatar for St Pierre Plumbing & Drains LLC
St Pierre Plumbing & Drains LLC
5.0(
6
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

Professional Plumbing & Drain Cleaning in Raymond, NH.\nAt St. Pierre Plumbing & Drain Cleaning, we believe you shouldn't have to gamble on the quality of your plumbing. We deliver top-tier residential and commercial plumbing solutions with honest communication, transparent pricing, and dependable workmanship every step of the way.

Project Photos
20 neighbors recently requested a quote
Avatar for Coy Plumbing & Heating
Coy Plumbing & Heating
5.0(
8
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

In business since 2024

Free estimates

Emergency services offered

"We were very pleased with the communication and the outcome of our project. We have an old home with some older piping. Finding someone that works on steam boilers is tough. When they looked at the install, they explained what needed to happen clearly deand unrstandable."
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+4

Response time2 days
Response rate100%
Recommended by87%of homeowners
Avatar for TJ Thistlewood Plumbing & HVAC
TJ Thistlewood Plumbing & HVAC
5.0(
6
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

Emergency services offered

"Tyler was extremely helpful and accommodating and helped me on very short notice with 2 plumbing projects recently, even spending almost an entire Saturday working when a washing machine install ended up being more work than expected. He is professional and extremely reasonably priced. Will definitely recommend and use for all of my plumbing needs."
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+1

Recommended by100%of homeowners
Avatar for DF Richard Energy
DF Richard Energy
4.1(
31
)
Tankless Water Heater - Install

Serving Dover, NH and surrounding areas

In business since 1932

Free estimates

Emergency services offered

"Great! The owner, DF Richard, came out personally before our first filling to introduce himself and explain everything. Shortly afterwards, we had a wicked bad storm and lost power for 2 days, so we really needed the propane. They even topped off my tanks during the power outage, not because I called, but because the driver was in our area and wanted to be sure that we had enough fuel to keep our generator running until power was restored. Awesome customer service!!"
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Recommended by80%of homeowners
Showing 1-10 of 30

The Dover, NH homeowners’ guide to tankless water heater installations

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