Established in 1956, Dubuque Supply Company is one of the leaders in heating and cooling supplies. A locally owned and operated wholesaler, Dubuque Supply Company, is your complete and comprehensive direct source for heating, air conditioning, controls, refrigeration, boilers, plumbing and ventilation. We have earned recognition and trust in the states of Iowa, Illinois and Wisconsin. Highest quality products and superior services is our commitment to our customers and to this day, our goals remain unchanged: provide customers with professional yet personal, prompt service for your residential or commercial applications.