A&B Mechanical is a full-service HVAC company that can take care of all your needs, from basic system maintenance to extensive problem assessments. We have qualified in-house personnel who are here to help you satisfy all of your HVAC needs. So call us today! We would be happy to help you out. A&B Mechanical specializes in heating, air conditioning, and refrigeration. With over 20 years experience, we take a lot of pride in our work to provide extraordinary service at affordable prices. Servicing Baltimore and surrounding counties.