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TRUSTED BY DOVER, NH HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon582
    Verified boiler installation services reviews

Find Boiler installation pros in Dover

Avatar for Palmer Gas & Oil
Palmer Gas & Oil
4.6(
88
)

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1932

Free estimates

Emergency services offered

"The service technician Victor arrived on time and politely introduced himself. Prior to commencing work he inspected the work area (installation and clearances etc). He explained the house heating would be off as he cleaned filters etc. After cleaning/adjustment/testing was conducted, he went over the test results printout with me. All good and nothing required further work."
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+11

3 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Freedom Air Mechanical
Freedom Air Mechanical
4.8(
14
)

Serving Dover, NH and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Very well. I felt Craig was very professional and very knowledgeable. I think the previous company did me a favor when I was told they couldn’t service my boiler any longer"
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+36

Response time1 day
5 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Walshco LLC
Walshco LLC
5.0(
15
)

Serving Dover, NH and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"I had a zone issue with my forced radiant heat system. They were able to quickly diagnose the issue, and came up with a cost effective solution. I highly recommend them to anyone having furnace issues this winter, and they're super friendly!"
roth 275
roth 275
Roth 160 Gallon Tank
Response time9 hrs
Response rate100%
13 neighbors recently requested a quote
Sunrise Heating and Cooling
5.0(
5
)

Serving Dover, NH and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Sunrise Heating and Cooling did an excellent job installing my new Rinnai tankless water heater/boiler. From start to finish, the experience was smooth and professional. The crew was knowledgeable, punctual, and took the time to explain the system and answer all of my questions. The installation was clean, efficient, and clearly done with attention to detail. Everything works perfectly, and I couldn?t be happier with the upgrade. It?s clear they take pride in their work. If you?re looking for reliable, honest, and high-quality service, I highly recommend Sunrise Heating and Cooling."
24 neighbors recently requested a quote
Recommended by40%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.2(
1,355
)

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

159 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
3.7(
43
)

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%
10 neighbors recently requested a quote
Avatar for Bourne Family Plumbing, LLC
Bourne Family Plumbing, LLC
4.7(
9
)

Serving Dover, NH and surrounding areas

Approved

Free estimates

Credit card accepted

Bourne Family Plumbing LLC is a veteran, family-owned and operated plumbing company proudly serving Derry, NH and surrounding communities with nearly a decade of hands-on experience. Built on integrity, discipline, and pride in workmanship, we deliver dependable plumbing solutions homeowners can trust.\n\nWe specialize in plumbing for home additions and professional water heater installation and replacement, ensuring your upgrades are done safely, efficiently, and up to code. Whether you’re expanding your home or need reliable hot water restored fast, we bring the skill and precision to get it done right the first time.\n\nOur mission is simple: honest pricing, clear communication, and quality work that stands the test of time. No shortcuts. No surprises. Just solid plumbing backed by strong values.\n\nWe proudly offer discounts for military members, fellow veterans, and seniors as a thank you for your service and dedication.\n\n

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project photos

+14

11 neighbors recently requested a quote
Avatar for Paul The Plumber, LLC
Paul The Plumber, LLC
3.6(
19
)

Serving Dover, NH and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"The Paul the plumber team was really great. I needed a whole AC replacement, air handler and compressor/ heat exchanger. From quote to install was under a week! This all happened during those crazy hot 95+ degree days so it was urgent. The only issue I had was the air handler was installed backwards. The team had to come out a 3 rd day to make it right. But they did and no harm no foul. The price was right and the quality and craftsmanship looks really good. I definitely recommend Paul the Plumber."
New Boiler
Old Boiler
Rinnai Tankless Water Heater
Gas Furnace
A/C Condenser Install

+11

Response time2 days
3 neighbors recently requested a quote
Recommended by73%of homeowners
Showing 1-10 of 47
Install Boiler questions, answered by experts

Most home boilers will need an expansion tank. That’s because these boilers are closed-loop systems, where the water is trapped. An expansion tank is needed when the boiler heats the water and it expands, allowing air to condense in the tank to make room for the water. Other types of boilers don’t use an expansion tank, such as traditional steam boilers, but these aren’t as common. And hot water tanks may be able to use a pressure release valve instead. When in doubt, call in a pro to take a look.

The right type of HVAC system will depend on several factors, including your climate, budget, preferences, and existing HVAC setup. For example, if you live in an area that experiences extreme weather, then a split system would likely be the best option. Or, if budget is a concern, consider installing a ductless system in just one room.

Deciding whether or not to replace radiators with a different heating system depends on your personal preferences. Radiators can take longer to heat up than a central heating system, and they take up floor space. However, they can be very efficient at heating, and they keep rooms at a more comfortable humidity level in the winter than forced-air systems.

Always consult your manual for specific pressure numbers. Many expansion tanks come pre-pressurized at a specific PSI range, anywhere from 12 to 40 PSI, designed for a range of home boilers. You should not have to pressurize an expansion tank yourself, only the boiler system. If your system has a tank that needs to be manually pressurized, this is generally a job for professionals and their tools.

Yes, government incentives and programs are available to encourage energy-efficient upgrades in many regions. These incentives may include tax credits, rebates, grants, and low-interest loans for homeowners who invest in energy-efficient improvements such as HVAC system upgrades, insulation, and efficient windows. The availability and specific details of these incentives can vary by location, so check with your local government or utility company to explore your options.

The Dover, NH homeowners’ guide to boiler installation services

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