AD & D Air, Heat and Electrical opened its doors to the people of Clinton, MS and surrounding areas in 1999, beginning a tradition of great customer service and honest HVAC repairs and installation. We've remained small so we can focus on quality service. That means we arrive on time and prepared. We offer emergency after hours service when needed. If your air conditioner, heater or water heater isn't working, give us a call and we'll be glad to help.