Enjoy Better Hot Water All Year with GEM

If you’ve ever run out of hot water mid-shower or waited for a tank to refill before doing laundry, you know how frustrating a traditional water heater can be.

Older tanks can struggle to keep up with daily household demands, leaving you with inconsistent temperatures, higher energy bills, and ongoing maintenance. Upgrading to a tankless water heater solves these problems while improving your home’s efficiency. Unlike traditional systems, a tankless model heats water on demand, providing endless hot water while saving space and energy.

At GEM Plumbing & Heating Services, LLC, we help homeowners throughout Rhode Island and Southeast Massachusetts take the stress out of this upgrade with clear guidance and expert installation. Offering decades of experience installing tankless water heaters, GEM makes the process simple.

We handle every detail so you can enjoy reliable hot water and peace of mind. Contact GEM today to schedule your tankless water heater installation.

(833) 222-2953

GEM Technicial Inside Van


(833) 222-2953

Tankless Water Heater Installation Done Right

Choosing the right installer makes a difference in how your system performs over time.

GEM has been working in homes throughout the region for decades, giving our team a clear understanding of local water conditions, housing styles, and system demands. That experience helps us recommend the right tankless setup and complete installations that perform reliably. With technicians already working in neighborhoods across the area, we provide responsive service, clear communication, and a process that feels straightforward from start to finish.


Skilled employees

Trucks on the Road

Years in Business

Emergency Service


GEM’s Step-By-Step Tankless Water Heater Installation Process

GEM keeps the process of installing a tankless water heater simple and straightforward.

We evaluate your household’s water usage, number of bathrooms, and daily demand to determine the right system size, ensuring your new tankless unit can supply hot water efficiently for your family.

GEM walks you through high-quality models, explaining energy efficiency, durability, and capacity. You’ll get clear recommendations that balance performance with your budget.

Our technicians carefully install the unit, connecting plumbing and electrical systems according to code. Every installation is completed with precision to ensure long-lasting reliability.

Once installed, we test the system thoroughly for proper flow, temperature, and performance. We also walk you through operation and maintenance so you feel confident using your new tankless water heater.

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What Our Customers Are Saying

100% Satisfaction Guarantee

4.6
Based on 8686 reviews
Two Gem workers showed up to do annual service on time. Dave and his coworker were friendly, professional and excellent communicators.
The professionals from Gem came to our house to fix a leaky well pump. Fortunately, they diagnosed the problems, and were able to replace our well and tank all in one day. They showed me how bad the pump and tank were, gave us options, gave us estimate. After everything was installed they tested everything to make sure it was in working order. I had a great experience, and I would highly recommend using them. I cannot thank them enough.
Chris and Nem cleaned & checked the parts of my A/C system making sure all was functioning properly. Both helped me have a better understanding of how the unit works & things to consider as upgrades to the HVAC system. Based on their visit I plan to renew my annual maintenance plan.
Quick appointment, resolution and everything‘s working great
Great experience. On time, pleasant and performed work efficiently.
Excellent professional service. Joseph explained everything about our annual A/C maintenance service. He is a fine representative for GEM.
Dovantay was very knowledgeable and professional.Dovantay did a great job.
Was able to get an appt right away and excellent technicians
GEM customer service and technicians are great. They communicate with you, are prompt, courteous and very knowledgible.
Quality work, fast response time. Great staff and incredible technicians.
Thanks for your excellent service.
Scott was kind and very welcomed , explained what the issue could be and recommended few option , he was very thorough and knowledgeable.
Luis and Edwin did an OUTSTANDING job in replacing my old furnace with a new one. They were thorough in every aspect of the job. From removal to the new install and clean up. Very professional and answered any questions I had. I can't thank them enough for the excellent Jobe they performed. 👍👍👍👍
He was on time , very professional, and knew how to correct our plumbing problem9 on
Excellent service, highly recommended. We had a ceiling fan replaced with a chadelier on a cathedral ceiling. It was not that easy, and they did a great job!
Knew his business well, was extremely friendly and patient with me. Overall, just a very pleasant experience.
Anthony Pena was SUPER !

Labor Price was RIDICULOUSLY Overpriced !!!!
Outstanding evaluation of mini split 2 heads and the exterior fan. Excellent service for better maintenance going forward. Detailed inspection and testing of all components including outside line bundles and their likely performance considering deterioration to date. Options, benefits and costs compared and explained. Decisions made and work performed immediately and perfectly!!! Thank you Richard and later for satisfaction follow up. Calling GEM is the best decision I have made as a homeowner. THANK YOU!!! To Eric, Genaro, Jacob, Leo, and your whole team for your superlative work ethic and dedication to the process from of dismantling our 80 year old boiler / hot water system to installation of our new tankless water heater system. And the GREAT clean up also! You are highly trained professionals and finely tuned team. Your attention to every detail and completion of each phase has made me a happy and confident customer.
Knowledgeable and friendly
Technician was very responsive and with great attention to detail.
I've dealt with Carmines for years. Decided to give them another job following their acquisition by GEM. Still the same good-hearted people. Paul came to our house & w/in minutes diagnosed the prob with our mini-split AC system: a clogged drain. He explained everything about the system; did a great job; & was a pleasure to speak with.
I contacted the office later with a billing inquiry later. Sonja in Customer Service resolved my call to my satisfaction. I will do business with GEM Carmine's again.
Josh and Kevin were fantastic. They showed up on time and were very helpful and professional. At every step of the process, they kept me informed. They tested the units and showed me and my wife how to operate and select the functions we like with our remote. Thank You GEM for a great job. Thanks Kevin and Josh for your professional manner and you're great work.
All options were explained with pros and cons of each. The Technician was extremely polite and professional in explaining the options and repairs that were needed.
Very happy with the service. The men were kind, professional, and did quality work. The whole process from booking the appointment to work being finished was very fast.
John was very conscientious


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(833) 222-2953

4 Clear Signs Your Home Could Benefit from a Tankless Water Heater

Traditional water heaters are reliable for a time, but there are clear signs that an upgrade is overdue.

Watching for these issues can save you money, improve comfort, and prevent future emergencies.

If your showers or laundry cycles leave you waiting for water to heat up, your current tank may not meet your household’s needs. Tankless systems provide endless hot water on demand.

Older tanks heat and store water constantly, wasting energy. Switching to a tankless model can reduce your utility costs by heating only what you need.

Traditional tanks take up significant space in basements, closets, or utility rooms. Tankless units are compact, freeing up space and giving your home a cleaner, modern look.

Visible rust, corrosion, or leaks indicate your water heater is at the end of its life. Replacing it with a tankless system prevents damage and improves reliability.

How Long Can You Expect Your Tankless Water Heater to Last?

Tankless water heaters are built for longevity, often lasting 20 years or more with proper care, roughly twice the lifespan of traditional tank models.

Their durable components and efficient design help minimize wear, giving you reliable hot water for many years. With regular care, a tankless water heater can provide your home with consistent comfort and fewer replacements.

Unlike traditional units that often fail after a decade, a well-maintained tankless system is engineered to provide reliable service for decades.

Since these systems don’t store water, they are significantly less prone to the rust and sediment buildup that typically shortens the life of tank-style heaters.

Most tankless models are designed with modular parts, allowing for easy repairs and component swaps rather than requiring a full unit replacement when a single part wears out.

Why New England Homeowners Rely on GEM for Tankless Water Heater Installation

Choosing GEM means working with a team you can trust for a major home upgrade.

From expert installation to long-term support, we make your project smooth and reliable. Here are some reasons why homeowners across New England choose GEM for tankless water heater installations:

We understand that waiting for hot water isn’t an option. GEM works quickly to get your system up and running as soon as possible.

With years of hands-on experience installing tankless systems across Rhode Island and Southeast Massachusetts, GEM has the know-how to handle any home.

We provide clear, honest guidance about system choices and installation, helping you make decisions that fit your home and budget.

Every GEM technician is fully licensed and insured, giving you peace of mind that your installation meets all local codes and safety standards. We stay current with industry certifications and regional requirements.

We stand behind our work with strong warranty coverage on both labor and equipment, protecting your investment for years to come. If issues arise, we’re here to make things right.

GEM provides upfront, detailed pricing before any work begins, so you know exactly what to expect. We believe in honest estimates with no surprise charges or last-minute add-ons.

Water heater in a residential basement.

(833) 222-2953


customer and technician interaction

Our GEM Family Cares for Your System’s Entire Life

Your homes HVAC, plumbing and electrical systems work hard all year. Regular maintenance keeps it running efficiently, quietly, 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 home’s systems running the way they should, year after year.


Maintaining Your Tankless Water Heater for Long-Term Comfort

A tankless water heater delivers consistent hot water, but regular care is key to keeping it performing at its best.

Flushing the system, checking for mineral buildup, and inspecting components periodically ensures efficiency, prevents corrosion, and extends the life of your unit.

GEM’s Home Comfort Club takes the worry out of maintenance. Members get routine service visits, automatic reminders, and priority scheduling so their tankless system runs smoothly and provides hot water for years to come. Ask about the Home Comfort Club today!

GEM technician in front of service truck



Schedule Your Tankless Water Heater Installation With GEM

Upgrading to a tankless water heater is a smart investment in comfort, efficiency, and peace of mind.

Reach out today to schedule your free consultation or chat with our team to learn how a tankless water heater can transform your home’s hot water experience.

What Is a Tankless Water Heater and How Does It Work?

A tankless water heater, also known as an on-demand system, heats water only when you need it rather than storing it in a tank. As water flows through the unit, it is heated instantly, eliminating standby energy loss and providing a continuous supply of hot water. This design is more compact and energy efficient than traditional systems, making it a practical option for many homes.

How long does a tankless water heater installation take?

Most installations are completed in a single day, depending on your home’s size and existing plumbing or electrical setup. Some projects may take longer if upgrades or adjustments are needed. GEM works efficiently and keeps you informed throughout the process.

What type of tankless water heaters does GEM install?

GEM installs high-quality, energy-efficient tankless gas and electric tankless water heaters from trusted manufacturers. These systems are selected for reliable performance and long-term durability. Your technician will recommend options that fit your home’s needs and usage.

Will installation require modifications to my home?

Some installations may require minor updates to plumbing, gas lines, or electrical connections. These adjustments help ensure the system operates safely and efficiently. GEM completes all work cleanly and prepares your system for immediate use.