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Dennis Furnace Installation Experts

A warm home gives you comfort and safety through Massachusetts winters. A new furnace provides peace of mind when temperatures drop in Dennis.

At GEM Plumbing & Heating Services, we take your needs seriously. Having a quality furnace in place is about more than just comfort; it’s also about safety. Our team has been installing furnaces in Dennis since 1949.

We examine your property’s heating demands, guide you to the right furnace choice, and ensure comfort no matter how harsh the weather gets. Call GEM today to schedule your furnace installation in Dennis.

(833) 222-2953

GEM Technicial Inside Van


(833) 222-2953

We’re Local to Dennis and Cape Cod

Dennis sits right on Cape Cod with direct ocean exposure from both Bass River and Cape Cod Bay, and that coastal location matters more than most people realize when you’re installing a furnace.

Salt air corrodes metal. Humidity affects ductwork. Nor’easters hit harder here than inland Massachusetts. Properties in Dennis Port face different conditions than homes in West Dennis or East Dennis. GEM’s HVAC technicians have worked in Barnstable County for 75 years. We know which furnaces hold up to Cape weather and which ones don’t. We account for your property’s exposure and building age when we size systems – not just whatever unit fits your basement.


Skilled employees

Trucks on the Road

Years in Business

Emergency Service


Our Furnace Installation Process

You know that you need a new furnace, but you’re not sure where to start. Our GEM family makes it simple. We understand that there are plenty of things to consider when the time comes to install a new heating system. That’s why GEM makes getting a new furnace installed in Dennis simple, transparent, and stress-free from start to finish.

Pick a time that works for you. Our technicians perform a detailed evaluation of your current heating system, ductwork, and energy usage to ensure your new furnace is properly sized and designed for your space.

You’ll receive a clear, honest quote with no hidden fees—just straightforward pricing so you can make an informed decision with confidence.

Our licensed installers remove your old system (if applicable) and install your new furnace with expert precision, following all safety codes and manufacturer standards.

Before we finish, we thoroughly test and calibrate your furnace to ensure it’s heating your home evenly, efficiently, and reliably. Once we’re confident your system is performing at its best, we’ll walk you through its features, answer any questions, and share maintenance tips to help you get the most from your investment.

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(833) 222-2953


What Our Customers Are Saying

100% Satisfaction Guarantee

4.6
Based on 9643 reviews
gilbert serra
10 hours ago
Very pleasant and very honest, and they cleaned up after their work and would definitely use them again.
Bob Strouse
11 hours ago
Great service, very clean and professional. Very happy with Gem.
Karen Gray
12 hours ago
Working with Nick to get all my bathroom faucets replaced was a pleasure. Karen Gray
Alyssa Zelman
12 hours ago
Great communication, went the extra mile, professional and friendly. Came out same-day, on-time. Def recommend!
Allan Barbash
14 hours ago
Great service he was very thorough.
Darlene ONeill
14 hours ago
Xavier was confident, efficient, knowledgeable, prompt and treated his trainee with respect.
Dale Abbott
17 hours ago
Great job. They know their “stuff”!
Jim Walsh
19 hours ago
Super fast response time (called at 4:00 on Monday and Mike & Chris were at the house at 11:15 on Tuesday). Mike and Chris were excellent, diagnosed the source of the odor (bad wax ring) and completed the job by 12:15.
Everything from the initial phone call to the quick response from our techs and the repair of our system was an A+! Would recommend to everyone.
GEM was one of only services that got back to me and scheduled me on the same day! Colin was quick, professional, and someone I felt safe having in my home. You get what you pay for!
Corey was outstanding , very helpful, informative and friendly !
Noemi Jordan
1 day ago
Khorey J. and his colleague did an excellent job inspecting our heating and cooling mini-split system. They took the time to explain the issues in detail and gave us peace of mind and at ease by ensuring that everything was working properly. They also explained and demonstrated when the condenser fan should turn on at various temperatures and settings. Both men were knowledgeable, professional, polite, and respectful. We have been customers of Gem Heating and Plumbing for many years, and, as always, they were there when we needed their services. Thank you, Gem Plumbing!
John O'Leary
1 day ago
Efficient and spot on always
Michael Hoff
2 days ago
John did a great job servicing our central heat pump and boiler. He was thorough and a great communicator. Thanks!
Joe Burgess
2 days ago
Great people Very professional Explanation of everything Excellent job
Patricia Criner
2 days ago
Very personable guys Joe and Landon did a thorough inspection and make sure I completely understood all options for the future
Cindy Mossman
2 days ago
Electrical replacements
Peter Rintels
2 days ago
Have used GEM several times. After some rough experiences with some other HVAC companies, I can say GEM has been consistently outstanding. Highly recommended.
We had an emergency service performed on Saturday, the technician Chris was professional and talked me through everything he was doing. I’d rate his overall work on a scale of 1-10 as over 10 because he was that awesome. What gets me is the pricing of the service. As I mentioned it was an emergency, and as the customer I want an itemized breakdown of parts and labor. I just called GEM and they mentioned they do not provide that. I will continue to call until I get the satisfaction I want on full disclosure of MY billing statement the was paid for in FULL by MYSELF. I know GEM reads these reviews and I want my fully itemized bill for services rendered.
Very satisfied with the service
Bill Cater
2 days ago
The GEM team, Richard (Rickey) and Gabriel along with the electrician were extremely professional. They cleaned up the entire work site with great care to ensure no dirt was left behind. Xavier was outstanding during the service call. happy and highly recommend.
Alyssa Nguyen
2 days ago
Josue & Mike were the two technicians that came and did the work for our home. They were absolutely amazing and did an amazing job! Took their time to make sure everything was done right.
We were not getting heat from our boiler. It was old and not working properly. Richard walked us through a new boiler purchased. Thanks.
Stephen Pratt
3 days ago
Kevin did a great job and explained everything he did to my boiler
Carol Ferrera
3 days ago
Great job! The technicians are kind, courteous, professional and knowledgeable. Thank you!!

GEM technician portrait in front of GEM service truck

(833) 222-2953

How to Know When You Need a New Furnace Installed

Sometimes, it’s easy to tell you need a new furnace. Other times, though, you may need to look a bit harder to understand if your furnace is at the end of its lifespan.

A furnace that refuses to start is one of the clearest signs that something serious is wrong. While minor issues like a thermostat malfunction or tripped breaker can sometimes be the cause, an aging or failing system may be beyond repair. When you need furnace installation in Dennis, GEM is here to help.

Most furnaces last between 15 and 20 years, depending on maintenance and usage. Once your system reaches that age, it begins to lose efficiency and reliability, often requiring frequent repairs. A new furnace installation can improve performance, lower costs, and give you peace of mind for years to come. Whether you’re running a gas furnace or oil furnace in Dennis, upgrading to a modern system pays off.

Your energy bills and your furnace’s efficiency are directly related. As your furnace struggles to efficiently produce heat, it will use more energy to maintain your desired temperature, causing your utility costs to climb month after month. This is often one of the first signs that your heating system in Dennis is nearing the end of its lifespan.

If your furnace constantly turns on and off in short bursts, it’s working harder than it should to maintain your home’s temperature. This frequent cycling not only wastes energy but also puts extra strain on internal components, leading to faster wear and tear. For many homes in Dennis, short cycling signals it’s time for a new furnace installation.

We Install All Types of Furnaces in Dennis

No home is built the same; some rely on gas-powered appliances, while others count on oil or electrical systems.

Regardless of your home’s needs and requirements, we offer a comprehensive range of furnaces to deliver even, consistent heating all winter long. Here’s a look at the types of furnaces we install in Dennis:

Known for delivering quick and efficient heating, gas furnaces are one of the most reliable and durable types of furnaces. GEM installs gas furnaces in Dennis to provide powerful, consistent warmth through even the coldest New England winters. These systems are energy-efficient, cost-effective, and capable of maintaining steady temperatures throughout your entire home.

Oil furnaces are a dependable choice for homes without access to natural gas, offering strong, consistent heat in freezing temperatures. Many Cape Cod properties rely on oil heat, and GEM installs high-efficiency oil furnaces in Dennis designed to maximize warmth while minimizing fuel usage. Our technicians ensure every installation is done with precision and care, giving you a reliable heating solution built for long-lasting performance.

A great option for those looking for a safe, low-maintenance heating system, electric furnaces are effective choices for any Dennis home. They provide even, steady warmth without the need for gas or oil, making them ideal for areas where electricity is the primary energy source. GEM installs and services electric furnaces that combine quiet operation, high efficiency, and dependable comfort all winter long.

As the name suggests, solar furnaces use solar energy to provide clean, sustainable heating for your home. By integrating renewable energy technology, these systems reduce both your utility costs and environmental impact. GEM helps Dennis residents take advantage of solar energy with professional installation and support, creating efficient, eco-friendly comfort that lasts for years.

No matter the type of furnace you have in your home, GEM is here to help. We also install upflow, downflow, and horizontal furnaces in Dennis.

  • Horizontal Furnaces: For smaller spaces, horizontal furnaces are installed on their side, perfect for attics, crawl spaces, or tight basements.
  • Downflow Furnaces: Suitable for attics or other high placements, downflow models pull in air from above, distributing it downwards.
  • Horizontal Furnaces: For smaller spaces, horizontal furnaces are installed on their side, perfect for attics, crawl spaces, or tight basements.

Homeowners Trust GEM for Dennis Furnace Installations: Here’s Why

GEM is proud to serve Dennis and throughout Cape Cod. Our team knows the area well, and we take pride in being the heating company chosen by countless local residents.

At GEM, we’ve built our reputation on doing things the right way, because your comfort and safety come first.

Keeping people in Dennis and the surrounding New England area safe and warm is our passion. We understand that coastal winters can be challenging, and that a high-quality heating system can make all the difference. Choose GEM to work with an experienced team of factory-trained technicians.

When your furnace stops working, you shouldn’t have to wait days for help. GEM offers same-day service across Dennis and the surrounding area to restore your heat quickly and safely. Our team arrives promptly, fully equipped to diagnose and fix the problem so you can get back to a warm, comfortable home without delay.

From new installations and replacements to repairs and maintenance, GEM handles every aspect of your home’s heating system. Our technicians take a full-system approach, ensuring your furnace, ductwork, and thermostat all work together efficiently.

We believe great service starts with great people. Our technicians are not only licensed and factory-trained but also respectful, approachable, and dedicated to your comfort. From arrival to cleanup, you can expect courteous service and clear communication every step of the way.

At GEM, we prioritize energy efficiency to help you get the most from your heating system while keeping your utility bills low. We install high-performance furnaces and provide expert maintenance that improves system performance and reduces waste.

As a Mass Save® partner and Carrier Factory Authorized Dealer, GEM helps you take advantage of valuable rebates and incentives when installing energy-efficient heating systems. We make it simple to save money while upgrading your home’s comfort.

GEM technician entering service vehicle for home repair visit

(833) 222-2953


customer and technician interaction

Our GEM Family Cares for Your System’s Entire Life

Your furnace works hard through every New England winter. Regular maintenance keeps it running efficiently, safely, and reliably for years to come.

Our Home Comfort Club makes maintenance easy with annual tune-ups, priority scheduling, and discounts on repairs. We catch problems before they become emergencies and keep your system running the way it should, year after year.


Contact GEM for Furnace Installation Services in Dennis

We’re proud to serve Dennis and Cape Cod. We know the coastal winters can arrive quickly, and having a durable and reliable heating system in place is your key to staying safe and comfortable.

Call or contact GEM today to schedule your furnace installation appointment in Dennis, MA!

GEM technician in front of service truck

Other HVAC Services You May Need

Furnace installation is just one of GEM’s comprehensive range of heating and cooling services. Browse our other services below.


Furnace Installation FAQs

How long does it take to install a furnace in Dennis?

Most furnace installations can be completed in a single day, typically within 4 to 8 hours depending on the complexity of the system. GEM’s technicians work efficiently to ensure your new furnace is installed safely, tested thoroughly, and ready to keep your home warm.

When should I consider replacing my furnace?

If your system is over 15 years old, needs frequent repairs, struggles to heat your home evenly, or causes your energy bills to climb, it’s likely time to consider replacement. GEM can inspect your unit and provide an honest recommendation based on its condition.

What should I look for in a new furnace?

When choosing a new furnace, consider energy efficiency, system size, fuel type, and warranty coverage. GEM’s experts will guide you through your options to help you find the right model for your home’s layout, budget, and comfort goals.

Can I get rebates on a new furnace in Dennis?

Yes. Through Mass Save® and manufacturer programs, Dennis residents can often qualify for substantial rebates on high-efficiency furnace installations. GEM helps you navigate these programs and maximize your savings.

Will a new furnace lower my heating bills?

Modern high-efficiency furnaces use significantly less energy than older models, which can translate to 20% to 40% savings on heating costs. The exact amount depends on your home’s size, insulation, and current system efficiency, but most people see noticeable reductions in their monthly bills.

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