We were truly impressed by the company‘s professionalism. They were very accommodating with our special requests at the office, and sticked to the promised timeline. Chadwick and A.C. had a close look at our furnace and were amazing explaining everything from what we can do to service our unit, why certain parts are where they are, and how we can make improvements. Both of them were super patient and listed all the options we had to be able to make an educated decision about our furnace and HVAC. Overall we were very happy with the service from Sullivan and can only highly recommend them to everyone.