Expert AC Installation Services in Wellesley

Your Wellesley home should feel as comfortable as it looks.

From Wellesley Hills to the neighborhoods near Wellesley Square, exceptional homes deserve exceptional cooling. When your air conditioning system can’t maintain the comfort you expect, it’s time for an upgrade that performs at the level your property deserves.

At GEM Plumbing & Heating Services, LLC, we solve cooling problems for Wellesley homeowners. Our licensed HVAC team assesses your home’s cooling needs, recommends the right system for your space, and handles every installation with precision.

You get dependable performance from a team that’s served Metro West families for over 75 years. Take the next step toward better comfort. Call us today about air conditioning installation in Wellesley.

(833) 222-2953

GEM Technicial Inside Van


(833) 222-2953

We’re Right in the Neighborhood!

GEM has been serving Wellesley families since before the Massachusetts Turnpike extended through town.

That’s over 75 years of local experience. We know Metro West summers, we know Wellesley’s housing, and we know what reliable cooling looks like in homes from Wellesley Hills to the properties near Wellesley Square. Your neighbors have trusted us for generations because we deliver results that last. When you call GEM for air conditioning installation in Wellesley, you’re working with the team that’s been getting it right since 1949.


Skilled employees

Trucks on the Road

Years in Business

Emergency Service


Our AC Installation Process

Installing your new air conditioning system should be seamless and straightforward. GEM handles every detail with professionalism and care, making the entire process clear from consultation through final testing.

Book online or call when it works for you. With our large service fleet, we typically offer same-day or next-day availability.

Our technician evaluates your Wellesley home’s cooling needs and provides clear pricing with zero hidden charges or unexpected fees.

Your NATE-certified technician installs your air conditioning system safely and professionally. You don’t need to manage any of the details.

We thoroughly test your new system before we leave, ensuring everything operates perfectly. You’re prepared for comfortable summer months ahead.

Female Gem Plumbing u0026 Heating employee sitting at a desk smiling

(833) 222-2953


What Our Customers Are Saying

100% Satisfaction Guarantee

4.6
Based on 8486 reviews
Joan with Gem Plumbing and Heating was professional, knowledgeable, and did excellent work. He replaced our tankless water heater pump and explained everything very clearly. We really appreciate his expertise and would definitely recommend him!
The best ,very professional spent time and explained everything. Aaron was extremely nice and knowledgeable . The most important thing is he fixed the problem that another company didn’t. I am a true believer and signed up to be a. Member for on going maintenance.
I have been looking for a quality heating and plumbing company for some time. Gem is it.
Great timely service
Dave and Kyle are extremely knowledgeable on these water systems. Dave found the problem right off the bat. We are pleased that experienced people work for your company.
Dave is awesome! Knew exactly what to do and quick and efficient! Very nice guy! And Kyle is sweet! Hope to see them again! 5 plus starts from me! Thank you guys 💙
George was very professional, patient and knowledgeable. He arrived on time, explained what the issue was, and told me what needed to be done. I would definitely recommend Carmines for your repair needs.
Very fast install of 7-zone mini split system and required panel upgrade. From first call to work completion was less than a week. No quality issues of install and the workers were great. Overall GEM is very expensive, but quality and speed are fantastic.
Just completed AC tune up with Nick R. Courteous and knowledgeable service. Thorough and friendly. Arrived on time and explained his intent. Highly recommend!
Richard F. was the first Gem employee I met. My original appointment was to have the air conditioner yearly service (central air). After opening the side panel Richard showed me the black mold and rust inside the unit. NO ONE had ever opened the side panel during a yearly service appointment. There were years of built up black mold. I will NEVER use the companies I have used in the past. Richard presented 2 options. He was not pushy. He simply presented the information to me and answered all of my questions. Richard is respectful both professionally and personally. We scheduled the appointment for the following day (removal of the old unit and condenser and installation of the new.

The following day Richie and John arrived at 7:45AM. Leo then arrived. They worked from the time they arrived (7:45AM-5:00PM) until they completed the job. They are respectful both professionally and personally. They thoroughly explained all the work they did and gave me information that I did not know previously. Again, we get the a/c serviced yearly and no one had ever explained anything. They cleaned up after completing the work. I mean immaculately.
He came over on Easter Sunday and helped us with a big problem that could not wait. He explained everything in detail. He stayed until the problem was resolved. Really nice guy.
Tech was efficient, skilled, client focused and really nice
Very professional and nice. Answer our questions, highly recommended
Joe and Richard are extremely pleasant and professional. I was pleased that when I got the phone call saying that they would arrive in 45 minutes they were at my door in 45 minutes! We are very pleased that we called GEM Heating and Plumbing.
Solid squad, I was sad to hear Bill is retiring. Highly recommend GEM to anyone who has HVAC, plumbing, or electrical needs.
Services were very good. Technician was very polite, respectful and knowledgeable. I was very pleased.
Experts at there craft!! Clean everything as the when . I would recommend them to anyone
Very profesional and courtious and excelent workmenship
Very surprised and very pleased that I wasn’t charged for this visit since James determined that the problem should’ve been fixed the first time I called last month. Rather exceptional in these days and times many thanks.
Very good service . Friendly, polite men, did a great job fixing both toilets so everything is working well.
We are thrilled to write this review for our air conditioner service man. Michael is absolutely the best. He was friendly, professional and thorough. He took the time to explain what was going on with our system and made sure we understood what he was going to do. Michael is a definite positive addition to the GEM family.
Generator annual service- ran 4
days straight after the blizzard. Happy to get it tuned up and oil
changed. Thanks!
Richard was very knowledgeable
Very impressed Great personality
Explained everything in simple understanding
Installation workers are here now installing and I’m very impressed
Excellent job
Went over everything else
Great personalities
He was friendly, knowledgeable, and efficient. He provided good explanations and a better understanding of the workings of the generator.
The techs who replaced my furnace were very friendly and professional.

GEM technician portrait in front of GEM service truck

(833) 222-2953

Warning Signs You Need a New AC System

Understanding when your air conditioner needs replacement helps you avoid emergency failures during Wellesley’s warmest weather.

Pay attention to these indicators that it’s time to consider a new air conditioning installation.

Water pooling around your indoor unit or excessive moisture in your home indicates serious drainage or refrigerant issues. These problems don’t just affect performance; they can damage your property and create conditions for mold growth. When your AC produces persistent moisture problems, the underlying issues typically worsen over time. Replacing the system with modern equipment solves the problem completely and protects your home.

When air barely flows through your vents despite the system running, something has failed within your AC. Weak airflow makes cooling ineffective and forces your system to operate continuously without achieving comfortable temperatures. This poor performance usually indicates compressor failure or ductwork problems that worsen with continued use. A new installation designed for your home’s requirements restores proper airflow and consistent comfort.

Air conditioners generally function well for 12 to 16 years before efficiency naturally declines. Once your system reaches this age range, replacement usually makes better financial sense than ongoing repairs. Today’s AC technology provides superior cooling while using significantly less energy. Installing a new system improves both comfort and efficiency while giving you equipment backed by manufacturer warranties.

Rising electric bills despite unchanged cooling habits signal declining efficiency. Aging systems consume more power to maintain comfortable temperatures, especially during peak summer conditions. Modern air conditioning systems are engineered to operate far more efficiently, using substantially less energy while delivering better cooling performance. Upgrading typically lowers monthly expenses while improving overall home comfort.

We Install All Types of Air Conditioners in Wellesley

Every Wellesley property has unique cooling needs, and GEM offers energy-efficient systems to match your requirements.

Whatever solution works best for your home, you’ll receive expert recommendations, professional installation in Wellesley, and lasting reliability from Massachusetts’ most trusted HVAC company.

For comprehensive whole-home cooling, central air systems maintain even temperatures throughout every room. GEM installs high-efficiency central air conditioning in Wellesley that works seamlessly with your existing ductwork, providing quiet operation, lower energy costs, and consistent performance. These systems are perfect for Wellesley’s single-family homes and deliver reliable comfort throughout your entire living space.

Heat pumps provide both heating and cooling from one efficient system, making them ideal for Massachusetts’ varied climate. They transfer heat rather than generating it, offering year-round comfort with substantial energy savings. As a Mass Save® Heat Pump Installer, GEM helps you access rebates and incentives when you upgrade to heat pump installation in Wellesley, making this efficient technology more affordable.

For homes without existing ductwork or areas needing individual temperature control, ductless mini-splits offer flexible, efficient cooling. These sleek units let you manage temperatures room by room, delivering comfort exactly where you need it. They’re ideal for Wellesley properties with additions, historic homes, or finished spaces where installing traditional ductwork isn’t practical.

GEM: Proud to be Wellesley’s Trusted AC Installation Company Since 1949

For more than 75 years, GEM has been the HVAC company Metro West families trust for reliable comfort and honest service.

When summer heat and humidity arrive in Wellesley, your home should provide the cool sanctuary you need. We’re proud to help families throughout every neighborhood with all of their air conditioning installation needs.

We’ve served Wellesley and surrounding Metro West communities for generations, treating every customer with care and respect. GEM brings proven expertise and modern technology to every AC installation, delivering systems built for lasting performance.

With one of the largest service fleets in New England, we’re always nearby when you need us. GEM provides same-day service and efficient air conditioning installation in Wellesley to keep your home comfortable without extended delays.

We’re more than an air conditioning company. From plumbing and electrical services to comprehensive HVAC maintenance, GEM offers complete solutions to keep every system in your home operating properly.

Our NATE-certified professionals bring exceptional training and professionalism to every installation. We treat your home with respect, prioritize your safety and comfort, and ensure every installation is precise, safe, and built for reliable long-term operation.

As a Mass Save® Heat Pump Installer, Carrier Factory Authorized Dealer, and National Grid Value Plus Installer, GEM helps you access valuable rebates and incentives when installing energy-efficient cooling systems. We make saving money simple while upgrading your home’s comfort.

Our Home Comfort Club keeps your AC operating at peak performance through regular inspections, tune-ups, and exclusive member benefits. It’s the easiest way to protect your investment and maintain reliable comfort throughout every season.

Smart thermostat installation by GEM HVAC technician

(833) 222-2953


customer and technician interaction

Our GEM Family Cares for Your System’s Entire Life

Your air conditioner works hard every summer. 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 system running the way it should, year after year.


Contact GEM for New Air Conditioner Installation Services in Wellesley

Make this summer different.

GEM’s licensed HVAC team is ready to install the ideal air conditioning system for your Wellesley home and the surrounding Metro West area. With same-day availability, flexible financing, and 75+ years of trusted local service, we make it easy to lower your energy costs and enjoy lasting comfort all summer long. Contact us by phone or online today to get started!

GEM technician in front of service truck


Other HVAC Services You May Need


Air Conditioner Installation FAQs

What’s the average lifespan of a new air conditioning system?

With proper maintenance, most air conditioners last 12 to 15 years. Enrolling in GEM’s Home Comfort Club helps extend your system’s life with annual tune-ups, priority service, and expert care that keeps your AC running at its best.

Can GEM install air conditioning in older Wellesley properties?

Absolutely. Many of Wellesley’s historic homes don’t have existing ductwork, making ductless mini-splits or high-velocity systems excellent options. GEM specializes in finding modern solutions that preserve your home’s character while keeping you comfortable.

How long does an air conditioning installation take?

Most standard installations can be completed in one day. More complex projects, such as installing multiple systems or adding ductwork, may take longer. GEM’s team works efficiently and keeps you updated throughout the process.

Are rebates available for AC systems in Wellesley?

Yes! GEM participates in programs through National Grid and Mass Save® to help you access rebates and special financing for high-efficiency air conditioners and heat pumps. Our team will help you apply and maximize your savings on your new system.

What size air conditioner does my Wellesley home need?

The correct AC size depends on your home’s square footage, layout, insulation, and sun exposure. Wellesley’s diverse housing stock means each property has unique requirements. GEM’s licensed HVAC technicians perform a detailed load calculation to ensure your system is perfectly sized for optimal comfort and efficiency.

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