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Gaithersburg Air Conditioning and Heating is the most professional and most referred heating and air conditioning company in the county. From our hometown roots in Gaithersburg, we’ve been tied to Montgomery County and the surrounding area since 1970. For us, our heating and air conditioning business is about developing long-term relationships. Our team of professionals have satisfied tens of thousands of customers over the years and we are ready to meet your needs for heating, air conditioning and indoor air quality improvements. So, whether you are calling for routine maintenance, an emergency repair or a professional installation of a high efficiency heating and cooling system, Gaithersburg Air Conditioning & Heating is your best choice.