McMillen Heating & Cooling, LLC

For more than 55 years, we’ve helped homeowners and businesses throughout Tuscarawas County stay comfortable with dependable heating, cooling, and indoor air quality services. In Dover, Ohio, we install, repair, and maintain residential and commercial HVAC systems with an emphasis on careful workmanship and energy-efficient comfort. Our licensed, insured technicians bring precision and care to every job, whether we’re working on a furnace, central air conditioner, heat pump, ductless mini-split, or geothermal unit.

We handle new installations and system replacements, including proper sizing and load calculations so each new system is selected and installed with comfort and efficiency in mind. Our cooling installation services include central air conditioning, heat pumps with cooling capabilities, and ductless mini-split systems. From the initial calculations through the completed installation, we take pride in providing clean, professional work.

We also service and repair all makes and models of heating and air conditioning equipment—not only the systems we install. Our maintenance visits are designed to identify small issues early through careful inspection, cleaning, and testing. This ongoing support helps keep equipment in top condition and prepares cooling systems for the demands of summer.

Our experience also extends to commercial and industrial HVAC needs. We provide building automation systems, advanced zoning, custom sheet metal fabrication, and other solutions suited to demanding facilities. Through our extensive work with large manufacturers in the region, we’ve developed reliable systems focused on maximizing uptime, improving comfort, and meeting the specific needs of commercial and industrial settings. At McMillen Heating & Cooling, we believe in doing the job right the first time and taking pride in the quality of our work.