The Mechanical Contractors Association of Chicago (MCA) and Pipefitters Local Union (LU) 597 have developed Heat for Heroes, providing free repair of home heating systems for Chicago-area military families in need. With more than 15,000 active duty troops from the Chicago area alone, service contractors who belong to MCA and the HVAC service technicians from LU 597 are working through Operation Homefront of Illinois to help spread the word.