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A-Air Service, Inc. is a commercial and industrial HVAC service company based in Central Maryland. We have been in business for over 30 years, providing top-quality service to our clients. Our staff is dedicated to providing fast and efficient service to our customers, regardless of the size or complexity of the project. We specialize in HVAC repair, heating repair, air conditioning repair, preventative maintenance, emergency 24/7 service, HVAC system changeouts, building automation controls, duct work repair, dehumidification equipment, and GMP work. Our technicians are trained to service all makes and models of HVAC equipment and controls. We provide customized service plans to cater to each client's unique equipment and needs.