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HVAC Systems, Inc. is a full-service heating, ventilation, and air conditioning company serving the commercial, industrial, and institutional market in Southeastern Michigan. We offer a range of services, including maintenance, repairs, safety inspections, and new installations and replacements. Our experts specialize in making up air units, exhaust fans, economizers, and air balance services. We use only specified replacement parts and dispatch trained and courteous staff for repair and maintenance services, available 24 hours a day.