Carlson Bros, established in 1980, is a specialty contracting firm offering heating, plumbing, ventilation and air conditioning sales and repair services. The company offers gas piping, water and sewer mains excavation, and sewer and drain cleaning services. Its fire protection division offers services to a wide variety of customers, such as schools, hospitals and office buildings. The firm s subsidiary, Electric Constructors, specializes in creative lighting and general wiring for both the residential and commercial customers. The company is a member of the National Association of Plumbing, Heating and Cooling Contractors, and Mechanical Contractors Association of America. Carlson Bros has a database of more than 4,000 clients, and is located in Duluth, Minn.
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