Best Coil Cleaner in Jacksonville FL

I have been using Donovan for five years now for routine HVAC maintenance, one sizable repair to my old air handler, and most recently, installing a brand new outside unit and air handler.I am on their preferred customer program which I have found to be a good deal; for one annual fee (I paid $194 on last renewal), you get two service inspections and a discount on any new parts you may need as well as priority service/scheduling.When my old unit was dying, the technician inspected it and confirmed it was heading downhill fast, and he gave me a lot of good information and recommendations which helped me decide which new unit to get. I was given a choice of 3 systems, basically a good, better, best option, and while I had intended to go with the more expensive option/brand, some of the info he gave me led me to go with the more mid range option and I haven't been at all disappointed.I love the new unit and thermostat! The air handler is so quiet I almost cannot tell it's running. The only way I know is I will hear the thermostat click when it turns on if I am nearby. Otherwise, I just notice it is cooler or warmer in the house. My old one (a 2010 Lennox system) was much more noticeable when it ran.I went with a Carrier and had been leaning towards Trane, but the technician said that Trane's air handlers have a plastic case which is more prone to deterioration over time than the metal. Also, he said once you get above about a 16 SEER unit, they get more complex and parts/repairs get more expensive, plus he said I didn't need the higher SEER rating for a house of my size. All very solid advice from what I have found so far.The install team (James, David, and Travis) did excellent work - they were punctual, kept me apprised of the status of the project, and took care with preparation and cleanup. Their estimate of how long it would take was spot on; they arrived about 8:30 and had said it should be done by mid afternoon and it was completed by around 3:30 PM.I have used one other heat and air company in Jacksonville and Donovan is far superior. They are honest, the technicians have never tried to sell me stuff I don't want or need, work and advice have always been high quality, and their fees have always seemed reasonable. I would not hesitate to recommend them to others.