CT Fuel Delivery & Home Comfort Testimonials

We always love to hear feedback from our valued New Haven County customers! If you’re pleased with our home heating oil prices, propane delivery speed, HVAC services, or other customer care, please let us know by writing a Facebook recommendation or Google review.


Have suggestions for our improvement? Please contact us directly so we can address the issue immediately. Thank you for your time!

Testimonials from Satisfied Oil, Propane & HVAC Customers

“We bought our house in 2008 and we purchased our HVAC. Since then, we have purchased a heat system for our sunroom and we have had propane installed for the generators that we bought. J.J. Sullivan Inc. serviced and supplied all of them. They serviced our HVAC. We are extremely pleased with them. We have actually recommended them.”

Janet E.

Customer since 2008

“Fantastic for sure! I switched from another company who I used because they had serviced the system when I bought my home. Over twelve years ago I made the move to J.J. Sullivan and I couldn’t be happier. The service is amazing. Since I became a customer I have had my furnace/boiler replaced and my central A/C. Everything went off without a hitch and everyone who’s ever been to my home from the owners Jim and Paul to the service techs (who I might add have been with the company for many years) are dedicated, knowledgeable, and eager to please. Before my replacements I needed many service calls so I have lots of experience with J.J. Sullivan. And, by the way I found out that my former company who gave poor service had not been doing full cleanings and I had CO2 readings when Sullivan’s first came. Apparently one of the parts to be cleaned is very difficult to reach in my tight space and the old company just didn’t bother. They did show me the neglected work. I have many friends and neighbors who originally referred me and we are all very happy long standing customers.”

Janet S.

Customer since 2007

“J.J. Sullivan supplies our oil for heating as well as a large propane tank for cooking and standby generator. They are always prompt and courteous. They have maintained and repaired our boiler/furnace. They come promptly when called and I have never had a problem with them. One day I thought I smelled gas and I called them and they were there within 10 minutes to inspect. Nothing was amiss but I appreciated their very prompt response. Service is great from start to finish.”


Customer since 2009

“From the start, we found J.J. Sullivan’s staff to be prompt, professional, and friendly. We purchased our furnace, water heater, oil, and now propane from J.J. Sullivan. We think their service is great. Once, we had a problem with our heat on Christmas Day, and a staff person showed up wearing a Santa hat and fixed it!”

Anonymous Guilford Resident

“We have used JJ Sullivan for our heating oil needs as well as for routine maintenance on our heating system since our first day in Guilford and they are terrific — a totally professional operation on every level, they value their customers and deliver cheerful and outstanding customer service without fail.  When those unexpected emergencies hit — those “oh no” moments — there is always a person a phone call away who will come and troubleshoot the issue, whenever it is needed, day or night.   Everyone on their team is friendly and helpful and a pro.  Recently we wanted to get a mini-split heat pump system for our Guilford home — it was a lot to wrestle, with many variables and considerations and complexities.   There was no question that we wanted JJ Sullivan to do the work for us.  JP himself made several site visits and always was helpful, patient and informative — we didn’t get a “sales job” — quite the contrary, he helped us to understand the nuances of the technology, and he was creative in coming up with cost effective and aesthetic solutions for our particular requirements.  When he and his team came on site to do the job, they were a marvel of efficiency and competency — the job was completed with great care, but also quickly and cleanly — on time, on schedule and for the agreed upon price.   With JJ Sullivan you know you can rely on them from start to finish 100%.  I am grateful to them for the care and thought they put into our project.  Really, a wonderful organization to do business with.  Thank you JJ Sullivan!”

George Agudow

Customer since 2016