Aaac service heating and air contractors recommend you get your furnace serviced before winter. It is important to change the filter inspect the flu heat exchanger and gas line. call today 770-875-4113 We take great pride in employing some of the most knowledgeable and professional technicians We show up with a fully stocked truck and the proper tools to provide a complete and professional repair. Your air conditioning and heating system needs routine maintenance to keep it running its best, just like your car. Without regular servicing, heating and cooling systems waste energy and are more likely to break down more frequently.