The HEATDOC™ Advantage
Cleaner fuel, better storage integrity, and improved component protection, are integral to optimizing the performance of your heating system.
Cromwell Energy delivers premium heating oil containing the state-of-the-art HEATDOC additive package.
With a unique balance of three stabilizers, HEATDOC not only keeps today’s fuel fresh, but also improves the latest blends of ultra-low sulfur and biodiesel, keeping your fuel healthy today and into the future. It cleans your heating system by reducing sediment build-up that may already be in your tank, pipes, filters and nozzle.
The HEATDOC additive includes a Fuel Stabilizer, a Dispersant (to gradually dissolve sludge), a Corrosion Inhibitor, and Yellow Metals Protection. Cleaner fuel, better storage integrity, and improved component protection, are integral to optimizing the performance of your heating system.
All heating oil is not the same. There is a reason why discounters charge less for their heating oil; inferior products cost less in the short run. Over time, untreated heating oil may damage your heating system, leading to increased service calls and a shorter system life.
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.
Heating Services
We sell, install and maintain most major brands of heating equipment, (boilers, burners and furnaces) including Burnham, Buderus, Viessmann and American Standard.
Air Conditioning Services
Cromwell Energy has the experience and expertise to professionally install and maintain your commercial or residential central air conditioning (AC) system.
Customer Testimonials
At Cromwell Energy, customer satisfaction is always our highest priority. Read some of our many 5 star reviews!
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+++.
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!
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!!
Cromwell Energy has always given us excellent service and we highly recommend them!
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!
Great service today on my air conditioner from Eric! He knows his stuff 🙂
We called Cromwell Energy for a recent AC issue because they promptly fixed an issue we had a cpl years ago. Rep Eric came to our home, quickly identified the issue and had the AC running in no time. He was obviously very knowledgeable as well as courteous and thorough! Once the AC was on he verified the issue was resolved completely before leaving. Cromwell Energy was reasonably priced, will definitely call them again!
Central A/C wasn't working when I needed it. Cromwell Energy sent Eric over the same day. They called before he came and he came when he was supposed to. He was very professional and methodic in tracking down and resolving the issue. I have been a custom for years and the service is always excellent.
Great service, extremely professional, very responsive to heating and cooling needs! My review is based on many years relying on Cromwell Emergy’s services.
Have used Cromwell Energy for several years and always happy with their work. Eric performed the annual service on my HVAC today, very pleasant and knowledgeable technician.
We have been a customer for many years and are always extremely satisfied with the service. Eric was out today to check our air conditioner unit. He was very knowledgeable, courteous and professional. We would recommend Cromwell Energy and we are grateful for the great service with Eric!
I recently encountered a problem with my A/C unit, and Cromwell Energy promptly sent a technician. He conducted himself professionally, clearly explaining the problems and available repair options. Before the technician was dispatched, I had the opportunity to speak with a service manager which is impossible for some companies. So big shout out to their technician Keith, great job.
Need Delivery or Service?
Need home heating oil delivery or HVAC services? Give us a call or send us an email today to get started!
308 Main Street
Cromwell, CT, 06416
(860) 635-1234
Areas Served
Cromwell, CT - 06416
Portland, CT - 06480
Middletown, CT - 06457
Durham, CT - 06422
East Berlin, CT - 06023
Berlin, CT - 06037
South Glastonbury, CT - 06073
Glastonbury, CT - 06033
Middlefield, CT - 06455
East Hampton, CT - 06424
Rocky Hill, CT - 06067
Wethersfield, CT - 06109
West Hartford, CT - 06107
Newington, CT - 06111