East Hampton, CT

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

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HVAC Services in East Hampton, CT

Are you looking for an HVAC contractor in Connecticut who can meet your needs and exceed your expectations? Look no further than Cromwell Energy. Since 1985, our family-owned company has provided AC installation, heating services, and home heating oil delivery in East Hampton, CT and beyond.

When you need quality service from a team of licensed and insured technicians, Cromwell Energy is your local go-to company. No matter what type of HVAC system repair and installation service you may need, we are here to help.

Heating System Installation, Maintenance & Repair

We know how crucial it is to keep your heating system up and running during these freezing East Coast winters. That’s why Cromwell Energy provides quick and efficient heating system repairs to East Hampton residents, 24 hours a day, seven days a week. We are a top rated heating company in CT, and have 5 stars on Google and Yelp, and an A+ rating in BBB. Cromwell Energy’s team of expert technicians can work all types of systems, and we install the top brands on the market, including IBC, Biasi, and American Standard. We also are experts in ductless systems, and install both Mitsubishi and LG heat pumps.

Air Conditioning Installation & Repair Services

Are you looking for a reliable AC repair company in East Hampton? Look no further than Cromwell Energy. During the summertime, the days can be too hot to handle – and you need your AC system to keep you cool. Our HVAC contractors are experts in all types of AC systems, and understand the problems that keep them from performing efficiently. Whether you need a quick repair or a new installation, contact Cromwell Energy.

Natural Gas Conversions

Cromwell Energy offers natural gas conversion services in the East Hampton area. We will provide a free, comprehensive consultation of your home to determine whether natural gas conversion is right for you. Cromwell Energy is part of the CNG/SNG (UI) and Eversource contractor networks, which means that we have the expertise to convert your home’s existing oil system to natural gas, safely and affordably.

Home Heating Oil Delivery in East Hampton, CT

Cromwell Energy is also a top provider of home heating oil in East Hampton, CT. Unlike other companies, we treat our oil with the HEATDOC additive to reduce sludge and corrosion and maximize efficiency. We will work with your schedule, budget, and needs to ensure that the oil delivery process is as convenient as possible!

From heating system installation, to oil delivery, to emergency HVAC repairs, our East Hampton, 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!