East Berlin, CT

Since 1984, Cromwell Energy, Inc. has been delivering quality HVAC installation, heating, and air conditioning repair services to the residents of East Berlin, Connecticut.

HVAC Services in East Berlin, CT

Cromwell Energy has been proudly providing home heating and cooling services in East Berlin, Connecticut for over 30 years. We offer a wide variety of HVAC services in East Berlin, CT including: air conditioning repair and installation, and heating repairs, installation and tune-ups. We offer emergency furnace and AC repairs, and are available 24/7 for our customers.

Heating System Installation, Maintenance & Repair

If you want to keep your home’s furnace working efficiently all year long, proper furnace maintenance and tune-up services are critical. You should conduct a furnace tune up once a year, and Cromwell Energy are the experts you want to call. We will come to your home and inspect the entire furnace and look for any signs of problems, while also following manufacturer guidelines to properly service the furnace. Our expert furnace technicians are trained to spot and fix small problems before they become major issues.

Thinking you need a new furnace installation in CT? Cromwell Energy offers expert furnace installation as well! We install and repair all types of heating systems, as well as hot water heaters. We even offer free estimates on all our installations, so you can be sure you are getting the best deal possible on your new furnace!

Air Conditioning Installation & Repair Services

Cromwell Energy’s technicians are licensed, insured and trained in using the latest technology on the market. From central air conditioning systems, to ductless AC units, our experts are well versed in how to repair, maintain and service your AC system. We take our time with every service and repair job, and provide up-front pricing to help you understand the cost/benefit of your repair. Don’t hesitate to give us a call 24/7 if you have a repair emergency. We are available day and night to make sure your HVAC systems are running effectively, especially during the periods of bad weather that are so common in CT.

We also install new air conditioning systems, and will help recommend the best system for your home. We install only the most reliable AC brands, including American Standard, Mitsubishi, LG, and more! Make sure your home stays cool all summer long with our custom and affordable AC installations in East Berlin and nearby CT.

Natural Gas Conversions

Considering switching from oil to natural gas to heat your home? Well, there are many benefits to making the switch, and Cromwell Energy is here to help you understand the pros and cons to converting. Many CT homeowners aren’t aware of the many rebates and financing options currently offered by Connecticut to convert from oil to natural gas, and why it may make sense to convert. As a member of the CNG/SNG (UI) and Eversource/Yankee Gas contractor networks, we have extensive experience in converting homes, and are happy to provide references.

Ready to make the switch? Cromwell Energy is East Berlin CT’s number one choice for natural gas conversion. We will come out to your home and give you a thorough, free consultation for converting your home’s existing oil-burning system into a more modern gas-burning configuration.

Home Heating Oil Delivery in East Berlin, CT

Cromwell Energy also provides fast and affordable home heating oil delivery in East Berlin CT, so your home will never be left out in the cold. With the state-of-the-art HEATDOC additive, our heating oil reduces sediment, and inhibits rust and corrosion. No matter what HVAC repair or installation service in East Berlin, CT you need, you can count on Cromwell Energy to get the job done right!

Your Cromwell Energy oil delivery specialists are trained, licensed and insured. We offer several oil delivery options in the East Berlin, CT, area to fit your budget and heating needs.

From heating system installation, to oil delivery, to emergency HVAC repairs, our East Berlin, CT, team is available to provide you with skilled, professional, and efficient service at an affordable price. Contact us today to learn more!

Oil Delivery & HVAC Services

In addition to our heating oil delivery, Cromwell Energy offers HVAC services throughout Middlesex and Hartford County, CT. We offer installation and maintenance services for most major brands of heating equipment (boilers, burners and furnaces) as well as commercial & residential central air conditioning (AC) systems. We also install the highly rated Mitsubishi ductless mini-splits and heat pump systems - which have become a go-to option for many Connecticut homeowners.

Heating Oil Delivery

To ensure that your home receives high quality fuel, Cromwell Energy delivers premium heating oil that contains the state-of-the-art HEATDOC additive package.

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Heating Services

We sell, install and maintain most major brands of heating equipment, (boilers, burners and furnaces) including Burnham, Buderus, Viessmann and American Standard.

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Air Conditioning Services

Cromwell Energy has the experience and expertise to professionally install and maintain your commercial or residential central air conditioning (AC) system.

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Customer Testimonials

At Cromwell Energy, customer satisfaction is always our highest priority. Read some of our many 5 star reviews!

Patrick Meaney

June 6, 2025

Great company for heating oil and HVAC needs. Staff provides excellent service and is very friendly and courteous. I have used them since 2018 and will continue to use them going forward. Can't recommend them enough!

Jen Tine

June 3, 2025

I have use Cromwell Energy for over 20 years and still couldn't be more pleased with the service I received for both my air-conditioning unit and boiler. The team was prompt, professional, and incredibly knowledgeable. They always take the time to explain what was needed to be done, answered all my questions with patience, and made sure everything was running smoothly before they left. Cromwell Energy clearly takes pride in their work and truly cares about their customers. The quality of service is top-notch-from the initial appointment to the final check. It's rare to find a company that's this reliable, respectful, and efficient. Highly recommend to anyone looking for trustworthy HVAC professionals.

Holly Linder

May 31, 2025

Great local company with excellent customer service. We have had Eric service our furnace the last few years and we have been very pleased with his professionalism and timeliness.

J T

May 30, 2025

My 30 year old boiler finally called it quits. I contacted a number of companies for estimates and I found Cromwell Energy to be the most responsive, flexible and willing to work with me. Today, their team of technicians remove the old and installed my new boiler. Once installed they took the time to go over the features. Technicians were neat and professional. Happy to be a new customer

James Henley

May 23, 2025

Great service as usual from Cromwell Energy. Technicians were on time and very effecient. Highly recommend!

Kelly Derosier

December 17, 2024

First time dealing with them. Annual service on a Navien Combi unit installed 2 years ago, they were great would highly recommend!

Joyce Walter

August 6, 2024

Cromwell Electric was wonderful to work with. Jeff gave a clear explanation of estimate for mini split a/c and installation happened within a few weeks (earlier than expected)! Tom, Jason and Ken were extremely professional and friendly. Got work done in a day without interrupting us in the home. Everything was cleaned up and took time showing us how to work the units and care for them. We will continue to use this company for multiple services when needed. A+++.

Lisa Raczka

August 2, 2024

Eric Mori came to do my annual service and he was exceptional! He took the time to answer all my questions, thorough and polite ! I was so pleased and he was neat and timely! He did both my AC and heating!

G - Pops

July 22, 2024

In the middle of a heat wave, our AC quit. Having used Cromwell Energy for furnace maintenance previously, I recalled the excellent service they provided. They did not disappoint again. Even though they were scheduling a week out, a technician became available the next day. Eric was professional, courteous, answered all my questions (and then some), and clearly was an expert in his field. Thanks to Eric and the excellent office staff, our AC stands ready for the next heat wave! Highly recommend Cromwell Energy!!

Nancy Joy

July 18, 2024

Cromwell Energy has always given us excellent service and we highly recommend them!

Barbara Hughes

July 15, 2024

I have used Cromwell Energy for more than 15 years. Eric performed the annual tune-up of my furnace and central A/C. He does a great job of explaining what is being done, was prompt, professional, and experienced. Highly recommend!