R&D Heating and Cooling know what they're doing and they do it well. They not only provide excellent service for me, but they offer the best in customer service as well, consistently satisfactory. They were the company that was used when this house was built, so that they have been the only ones to repair, maintain and service the equipment. They are honest, knowledgeable, and always helpful. I have used them for 10 years and will continue to do so.