Licensed Contractors in the field of heating, air conditioning, and plumbing. r.j. Groner has the tools, equipment, and experience to keep your equipment running smoothly all year long. If it is emergency service that you need, we are available to assist you twenty-four hours a day, seven days a week! To help reduce service emergencies, and to keep you comfort systems running at peak performance, we offer HVAC Tune-ups and HVAC Service Agreements. Serving residents of Monroe County since 1949!