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 8638 reviews
Michael from Gem Plumbing was here today to do an annual check on our central air conditioning system and mini-split system. He did a thorough check of all the components inside and outside the home. He is very knowledgeable and explained everything very clearly as to what he found and observed on our systems. This service was covered under our maintenance plan with Gem so there was no charge for today. Michael is a really friendly and personable guy and he did a great job at our home.
Scott was great. Gave me my options. For now just changed the toilet fill valve. A a bit pricey, but good to have changed it
Your co. And your ees. That helped me from having no heat for 3 days and are miracle workers. They were professional from beginning to the end.
I now have the comfort or a warm home.
I would recommend your company to my friends and family.
That you.
Experience knowledgeable friendly staff
Technicians were very professional, respectful and explained exactly what they would be doing and answered all my questions.
Great job
Fast, professional, really know what they are doing! Very responsive! Came 12:30AM one night and resolved a severe leak. Great people!

Update: Doing home maintenance now for heating, air conditioning and plumbing. Doing excellent assessments. Great service, knowledgeable staff. Very happy with GEM!
B
9/6/2025—-GEM does our HVAC service.
We had one condenser stop. They came, found an electric problem, sent the electricians in their group, ordered the required electrical panel and we are back up and running.
These people REALLY know what they are doing!!
Corey Mayo took care of it this morning- he was polite, informative, and efficient.
I was very pleased with GEM plumbing. They came when they said they would and explained everything. I would highly recommend them.
Gem has always been my lifesaver and yesterday they came through again. When GEM came yesterday for the annual boiler cleaning they discovered that my boiler was leaking carbon monoxide gas. It had not been leaking the year before so carbon monoxide leaking from your burner. It’s like a tire that’s going flat in the air is coming out. It only gets worse. They gave me an estimate on replacing it, I did some research and they said that they couldn’t install it the next day. The price was in line with everything I had researched and the Bernar rated very high on Trustpilot as did the warranty. Having worked with GEM before, I trust them and I made the deal. Today two men arrived two more came then the Electrician.They got the old burner out they got the new burner installed. They cleaned up the basement and I now have heat and no carbon monoxide.Thanks for being there again GEM.
John arrived within the time window, was courteous and professional. He explained what he was doing throughout the service call.
Great service as usual. Techs were very pleasant, knowledgeable and considerate. The explained everything so I could understand it.
Very professional and was sure to explain everything that was done and the condition of the system
David was professional, courteous and knowledgeable. GEM is lucky to have him. Just wished GEM helped out with some of the cost seeing how it was just installed seven years ago but I was very please with the service David provided.
Technician Joseph Sr, was on time, knowledgeable, neat and personable. Excellent service.
Great service for the annual ac check up!
Gem did a great job installing the new furnace and A/C systems for the house, their work was on time and Gem did a great job installing the new furnace and A/C systems for the house. Their work was on time and professional as always!!
Tim did a great job. Diagnosed the problem with my generator promptly and got it back in working condition right away. Recommended for generator service.
excellent Anthony.lllldid heating tuneup.my wife and I very happy with his work.
Prompt, communicative, friendly and precise. Nicole was amazing.
I had to call Gem on a Sunday for a leaking faucet that was causing havoc to my wood floors. Orlando was the technician. He saved the day!!!! I was so thankful!! It was quick he was so nice. He should get a raise for his customer service.
Tim was terrific.. very personable and knowledgeable ..he knows what he is doing..
..
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. 👍👍👍👍
Polite, professional, and diligent.
Mason was very polite and courteous. He explained everything

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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