Tri-State Kirby

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 vantilation. Established in 1956, we at Dubuque Supply have earned recognition and trust amongst our customers, for our commitment to delivering the highest quality PRODUCTS and superior SERVICES. To this day, our goal remains unchanged: provide you with professional yet personal, prompt service for any of your residential or commercial applications. Our staff, from any of our great LOCATIONS, will be happy to answer any questions about our complete line of PRODUCTS. SUPPORT is always available from our friendly sales staff as well! Dubuque Supply Company is your direct source for all of your commercial or residential HVAC applications, big or small. We are the area's largest wholesale distributor of HVAC equipment. Our Line Card represents well over 250 top vendors and manufacturers, with such exclusivity as Kelvinator and Second Wind, making us one of the largest family-run wholesale distributors serving the HVAC community.

Rentech Energy Midwest Corporation, formerly known as Royster-Clark Nitrogen, is one of the upper Midwest's largest ammonia fertilizer producers. It is a Delaware-based corporation that operates a nitrogen manufacturing plant that produces nitrogen-based fertilizer and industrial nitrogen products in East Dubuque, Ill. The company s plant operates ammonia and urea-ammonium nitrate pipelines to transport product from on-site storage to barges on the Mississippi River. Rentech Energy Midwest Corporation s products include anhydrous ammonia, nitric acid, urea and carbon dioxide. The company is a wholly owned subsidiary of Rentech, which is listed on the American Stock Exchange and is one of the world's leading synthetic fuels technology and development companies.