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 8530 reviews
Great team came to fix our leaking pipe. Truly professional. Did what needed to be done and were extremely well versed in codes and fixing mistakes of the past.
Had a furnance replaced. Went with a tank less water and furnace combi. Best decision made.
Excellent Service!! As usually
Nick is extremely knowledgeable and polite. Service to our AC was exceptional.Thank you. Highly recommend GEM…and especially Nick.
They provided fast and professional service.
Thank you Ryan for helping my case today. Called GEM this morning because my water heater broke out of the blue and there was water all over my basement. They put me on an emergency list and within an hour I had the guys here to check it out. Unfortunately I needed a new water heater and they were able to help me with that. They were fast, cordial and very efficient. I’m recommending them to everyone I know and have their number saved on my phone.
Joe and Danny came and did a great job. Replaced three-valve shower faucet with a single valve.
David came to fix the flange for my toilet. He made a quick and effective diagnosis and then did the repair in just a few hours, anytime I run into plumbing issues ill be calling GEM again, wonderful service
he did a great job
GEM came thru when our sinks were clogged. Colin exhibited professionalism in every way
Thoughtful and shared every step.
GEM workers well qualified, friendly and extremely helpful. Installed two new units in one day – efficient and excellent work.
Great service and smart young man Jordan was able to quickly solve problem with my AC unit and was extremely professional and talked me through the problem!
Thank you so much to Bill and Anthony for coming out and repairing our furnace. They were both very friendly and knowledgeable and answered all of my questions! Thank you again!!
Jonathan was very neat and helpful with my emergency plumbing needs
Honest and fair. Work was clean and well communicated. Response to issue was 24 hours. The three techs…Anthony, Brody, and Nick, were polite quiet clean work and communicated step by step… job well done.
Paul V from Carmine’s, arrived promptly and was very professional, knowledgeable, patient and has a great demeanor. He changed the control board of my HAVAC unit, and gave me great suggestions of the usage of it. Paul is very sincere and you can see his dedication to his work. I would definitely recommend Carmines and Paul V for any of your HAVAC needs.
Friendly, explained what was being done and what to watch out for.
Great job by David
Victor is the best. He fixed our clogged pipes and came out right away
Great service ! They were on time, respectful and took care of business quickly and efficiently
Lost our well water tank, great job with replacement. While here had them replace kitchen faucet and garbage disposal also. Will use GEM from now on!
Eric and Steve are great. Got the job done fast. Cleaned up. Terrific work.
We had 2 very old direct vent gas wall heaters replaced. Evan and Steve are the best. They explained everything and did a awesome job for never putting in these Rianni heaters . Kept me informed and answered all my questions and eased my concerns . Couldn't of asked for two better guys. The electrician and his assistant were outstanding with the fact the house was
built in 1925 with older wiring . Chen and his assistant installed 2 dedicated circuit for both heaters to run on and it works out great as now my air conditioner will run on the dedicated circuit this summer. Would recommend all of them for future heating needs .
We had the bathroom one downsized to a smaller unit with no issue what so ever even with them having to remove the bigger one they had put in they were happy to accommodate the issue
They are sweet, knowledgeable and quick. Thank you guys for an excellent job done, I appreciate it.

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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