Expert AC Installation Services in Waltham

Your home should feel comfortable no matter how hot it gets outside.

From the South Side to Pigeon Hill and neighborhoods throughout Waltham, reliable air conditioning makes your home livable when Middlesex County temperatures climb.

When your system can’t maintain the comfort you expect, it’s time for an upgrade. At GEM Plumbing & Heating Services, LLC, we solve cooling problems. Our licensed HVAC team assesses your needs, recommends the right system, and handles every installation with precision.

You get dependable performance backed by 75+ years of service to Middlesex County families. Call us today about air conditioning installation in Waltham.

(833) 222-2953

GEM Technicial Inside Van


(833) 222-2953

We’re Right in the Neighborhood!

GEM knows Waltham and the surrounding Metro West area.

From homes near Brandeis University to properties in Cedarwood, the Highlands, and throughout Waltham, we’ve been serving this Middlesex County community for generations. We understand Metro West summers and what it takes to keep homes comfortable when Massachusetts heat arrives. When you choose GEM for air conditioning installation in Waltham, you’re working with a team that’s served the area since 1949.


Skilled employees

Trucks on the Road

Years in Business

Emergency Service


Stress-Free AC Installation Process

GEM manages everything from consultation to completion, making your air conditioning installation in Waltham simple and efficient. Our streamlined process removes the uncertainty from upgrading your cooling system.

A licensed technician assesses your Waltham home’s cooling needs and provides transparent pricing with zero surprise charges or hidden fees.

We help you choose the ideal air conditioning system based on your home’s size, layout, efficiency goals, and budget.

Our certified team installs your new AC with precision, ensuring optimal performance and efficiency from day one.

Before we leave, we thoroughly test your system to verify proper operation and explain basic maintenance.

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 It’s Time for AC Replacement in Waltham

Your air conditioner provides clear signals when replacement makes more sense than another repair.

These warning signs tell you it’s time to consider new air conditioning installation in Waltham.

Air conditioners typically perform reliably for 12 to 18 years before natural efficiency decline begins. Equipment exceeding this age develops problems more frequently and costs more to operate. When your system passes 15 years, replacement usually delivers better long-term value. Modern systems incorporate technology that achieves superior cooling with reduced energy consumption, improving both comfort and monthly costs for Waltham homes.

Your air conditioner shouldn’t operate continuously just to maintain barely adequate temperatures. When your system runs all day but rooms stay warm, it’s telling you it can no longer meet your cooling demands. This constant operation wastes energy while failing to deliver proper comfort. Professional air conditioning installation in Waltham provides properly sized equipment that maintains consistent temperatures throughout your home without excessive runtime.

Grinding, squealing, or banging sounds signal serious mechanical deterioration developing inside your equipment. These noises indicate components breaking down or mounting stress that escalates with continued use. What begins as occasional noise typically accelerates toward complete breakdown. Replacement solves these issues permanently while giving you quiet, reliable cooling backed by modern technology and warranty protection.

When you’re scheduling AC repairs season after season, you’re maintaining failing equipment. Repair costs accumulate without solving fundamental problems. Aging systems develop cascading issues where each fix only postpones the next breakdown. Air conditioning installation in Waltham ends this expensive pattern and delivers the reliable cooling your Middlesex County home deserves.

We Install All Types of Air Conditioners in Waltham

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

Whatever solution works best for your property, you’ll get expert recommendations, professional installation in Waltham, and lasting reliability from Massachusetts’ most trusted HVAC team.

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

Heat pumps provide both cooling and heating in one efficient system, reducing energy bills year-round. Modern heat pumps operate effectively even during New England winters, making them an excellent choice for Waltham homeowners. As a Mass Save® Heat Pump Installer, GEM helps you access rebates and incentives when you upgrade to heat pump installation in Waltham, making this efficient technology more affordable.

Ductless mini-splits cool specific rooms without requiring ductwork installation. These systems offer flexible zoning control, whisper-quiet operation, and exceptional efficiency. They’re perfect for Waltham homes with additions, finished spaces, or rooms where installing traditional ductwork isn’t practical.

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

When Middlesex County heat and humidity arrive in Waltham, your home should provide the cool sanctuary you need.

We’re proud to help families from Moody Street to neighborhoods throughout this Metro West community with all of their air conditioning installation needs.

We’ve served Waltham 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 Waltham to keep your home comfortable without extended delays.

Our NATE-certified professionals bring the highest level of training and care to every job. We treat your property with respect, prioritize your safety and comfort, and ensure every installation meets exacting standards for performance and reliability.

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 simplify the savings process while upgrading your comfort.

Our Home Comfort Club maintains your AC in peak condition through regular inspections, tune-ups, and exclusive member benefits. It’s the simplest way to protect your investment and ensure 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 Waltham

Don’t wait for your system to fail completely.

GEM’s licensed HVAC team stands ready to install the ideal air conditioning system for your Waltham 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 reduce energy costs and enjoy lasting comfort all summer long. Call or contact us online now to schedule your consultation!

GEM technician in front of service truck


Other HVAC Services You May Need


Air Conditioner Installation FAQs

What brands of air conditioners does GEM install?

As a Carrier Factory Authorized Dealer, GEM installs top-quality Carrier systems known for durability and performance. We also service and replace most major brands, ensuring you get the best fit for your home and budget.

Can GEM install air conditioning in Waltham homes near Brandeis or Bentley?

Absolutely. Properties throughout Waltham, including neighborhoods near both universities, often have varied layouts and requirements, making professional assessment essential for air conditioning installation in Waltham. GEM specializes in finding the right solution for your specific property.

How soon can I schedule my AC installation in Waltham?

With our 500-truck fleet and local Massachusetts team, GEM often provides same-day or next-day installation. Call our customer care team or book online to schedule your free estimate and get comfortable fast.

What size air conditioner does my Waltham home need?

The right AC size depends on your home’s square footage, layout, insulation, and sun exposure. Properties include everything from historic homes to modern residences, meaning each home has different requirements for air conditioning installation in Waltham. GEM’s licensed HVAC technicians perform a detailed load calculation to ensure your system is perfectly sized for maximum comfort and efficiency.

Are rebates available for AC systems in Waltham?

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 helps you apply and maximize your savings.

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