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Founded by Davey Douylliez, JMD Corporation has been providing homeowners and businesses in the Northern West Virginia and Southwestern Pennsylvania regions, total solutions for installation, repair, and on-going maintenance for all heating, air conditioning, ventilation, and commercial refrigeration systems since 1988. Our technicians have extensive experience with conventional gas, propane, and oil furnaces, air conditioning and heat pump systems, as well as, hybrid heat and geothermal units.

Our goal is to provide exceptional customer service from the moment you call us until the work on your home or business is complete.

Our Services

Air Conditioning






Our Quality Guarantee

When you’ve made the decision to upgrade or repair your comfort system, choose JMD Corporation. We will help you select the ideal system for you, install your new system with care, and provide on-going support and maintenance for years to come.

24 Hour



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