We are excited to announce that our customer account portal has been updated! The new interface is more user-friendly than ever. If you have any questions about the new layout, please feel free to call us or email us at info@jjsullivaninc.com. 

We at J.J. Sullivan have been providing reliable fuel oil delivery and heating system service to the Guilford, CT area for more than 90 years. As a full-service energy company, we also offer propane fuel delivery, installations, and service; air conditioning installations and service; indoor air quality installations and service; and many coverage options for your heating equipment. Among our quality heating services are annual tune-ups, 24-hour emergency service, budget plans, pricing programs, oil tank protection, and comprehensive service plans. If you have questions or would like more information about any of our home comfort services, please contact our office and we will be happy to assist you!