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SULLIVAN Heating, Cooling & Plumbing is West Michigan’s most trusted provider for residential HVAC and plumbing services. We specialize in installation, repair, maintenance, and emergency service for furnaces, air conditioners, water heaters, boilers, and plumbing systems. Our certified technicians deliver reliable, energy‑efficient solutions tailored to your home’s needs.\nFrom keeping your family warm through harsh Michigan winters to ensuring cool, dependable comfort in the dog days of summer, our team is here to help. Homeowners choose Sullivan for our fast response times, honest recommendations, quality workmanship, and 5‑star customer care.\nWhen Your Comfort’s in Trouble, Call SULLY on the Double!

I’m a small, local HVAC company with 6 years experience. Licensed and Insured.

"We own a home-based business which relies heavily on our computers operating efficiently. We have had a service contract with another computer repair business for several years. Recently when we were having problems with our computers, we tried contacting our service contractor multiple times. He never responded. Feeling frustrated, I contacted James at North Alabama Technical Services and explained our situation. He instantly came to our rescue. He "cleaned-up" our computers and took care of all the problems we were experiencing. He went above and beyond to help us in our dire time of need. We would strongly recommend James and his company for computer service needs. We have now retained him on a service contract and are looking forward to working with him in the future."

"They've maintenanced my furnace before I required a new one and they've always maintenanced the new one since I got it replaced about 3 years ago. Very easy to work with. I think I've been using them since 2008."

"Amazingly fast service. Quoted to fix my HVAC and replace my central air unit $1,000 below a competitor! I highly recommend"

"I was able to reach the owner during his vacation, which surprised me. He was very prompt at visiting the hoiuse and sending a quote for the A/C and Furnace replacement. The work was completed on the date selected and in very little time. I'm impressed. I would eagerly recommend this contractor to anyone."

"Was on time, the install took a 1/2 hour longer than expected"

"Went OK. They did the work and it 'mostly worked' when they were done. I say mostly because the pressure valve was blowing off of the boiler when they were done (This was NOT happening before they had done the work). I had noticed this the day after I had paid. I contacted them and they wanted to replace the expansion tank and charge me $200. I asked - shouldn't this be covered under the initial work of $4600? They said the part wasn't explicitly in the quote. Frankly at this point to replace what really was a $40 part and half hour of time to do a fully finished job (for $4600). For 1. How am I supposed to know (as a customer) what should be on the quote for a fully finished job (pumps, piping, etc? - they are the expert) 2. How am I supposed to know this isnt their fault. (Shouldnt an autofilling expansion tank be connected to the incoming water supply?) Frankly not standing fully behind their work and making sure they do everything to do a good, finished job - left a 'bad' taste in my mouth. In the end I replaced the auto-filling expansion tank with an Extrol expansion tank for $40 and it took me less than an hour. After that it all appears to work."

"Excellent. They explained the process to us before starting, took before and after photos of the ducts. They worked hard and cleaned up thoroughly when they finished."

"Zach came out to give me a price for a new furnace and air conditioner. His price was cheaper than I expected and his turn around time was within weeks instead of the months I was hearing from other contractors. When it was time to do the project, he showed up on time, was very professional, answered all of my questions, and even cleaned up any mess they had made. I will have him do more work for me if it's ever needed."