Mid-State Air Systems

Mid-State Air Systems is a Worcester HVAC company that says it's been in business since 1983, working heating, air conditioning, and duct/sheet-metal work in Worcester and Shrewsbury. This spring, one customer praised technicians Keith and Nate for clearly and patiently answering questions during a service call. In a 2025 review, a customer described an HVAC system installed about a year earlier that wasn't distributing air evenly; a technician named Hayden came out promptly, made adjustments, and resolved the issue. Another 2025 review described Wayne and his team installing a heat pump system with new ducting and ductless units to replace an old forced-hot-water system, calling him communicative and quick with a competitive quote. A 2025 review also described Wayne resolving an issue on a system his team had installed four years earlier, and a 2024 review described phone-based diagnosis help for a central air conditioning problem. One customer, in a 2022 review, left a one-word complaint — "Unprofessional" — with no further detail. Separately, BuildZoom reports the company's HVAC/mechanical contractor license #2000 as expired since 2020 and not recently verified active, though that's the directory's own claim rather than an independent registry check; the Better Business Bureau lists the same license number along with two Massachusetts Department of Public Safety license numbers without stating their current status. Mid-State Air Systems holds an A+ rating with the Better Business Bureau, though it is not accredited. For HVAC installation, repair, or troubleshooting in the Worcester area, the reviews describe responsive, knowledgeable service — it's worth asking directly about current license status before booking, given the conflicting information available.