Heating, Air Conditioning & Refrigeration Distributors International (HARDI) is a trade organization dedicated to advancing the science of wholesale distribution in the HVACR industry. HARDI is a recent consolidation of two long time wholesale trade organizations – North American Heating, Refrigeration & Air Conditioning Wholesalers (NHRAW) and Air Conditioning & Refrigeration Wholesalers International (ARWI). The new organization represents over 450 wholesale companies, including 17 international companies, plus over 300 manufacturing associates and nearly 140 manufacturer representatives. It is estimated that HARDI members represent 80 percent of the dollar value of the HVACR products sold through distribution.
IMARK GROUP, Inc. is a member-owned marketing group made up of over 1,100 independently owned electrical distributors throughout the United States. Our membership includes over 70 members in the Top 200 largest distributors in the country. Member companies serve their local customers from over 2,000 branch locations. With over $15 billion in combined sales, IMARK Group is the largest member owned, member governed cooperative in the US electrical industry.
WIT is one of the largest plumbing and heating supply networks conducting more than $2.5 billion in aggregate sales. It is comprised of privately-owned businesses consisting of experts in the plumbing and heating industry. The affiliates of WIT & Co. have the local market, product expertise and flexibility to assist in your specific needs. Independent and professionally managed, WIT's affiliates serve their customers throughout North America and many other countries.
WIT & Co. has over 30 years of established growth and industry leadership. It is comprised of 85 plumbing and heating affiliate distributors across the nation, with more than 300 center and branch warehouse locations. Each affiliate has an extensive inventory of plumbing and heating material to serve you better.
NAED is the electrical distributors' source for networking, education and service. Since 1908, the National Association of Electrical Distributors has helped electrical distributors grow, prosper and provide value-added service to their customers, suppliers, employees and the world at large. Just as the electrical distributor is the source for electrical products, knowledge and value-added service, NAED is the source for electrical distributors to gain business opportunities, education, industry knowledge and information.
NCEL - www.ncel.org

The NCEL is an industry-wide professional trade association representing all divisions of the electrical industry in the Upper Midwest region. Incorporated in 1936 as a nonprofit organization, NCEL is governed by a board of directors appointed by each division of the NCEL's membership.
The NCEL's mission is the overall advancement of their members' interests in the electrical industry in Minnesota, North Dakota, South Dakota and Wisconsin. NCEL is an umbrella organization which manages several industry groups that are interrelated.
Focus on Energy works with eligible Wisconsin residents and businesses to install cost effective energy efficiency and renewable energy projects. Focus information, resources and financial incentives help to implement projects that otherwise would not be completed, or to complete projects sooner than scheduled. Its efforts help Wisconsin residents and businesses manage rising energy costs, promote in-state economic development, protect our environment and control the state's growing demand for electricity and natural gas.
American Supply Association - www.asa.net
American Supply Association (ASA) is a not-for-profit national organization serving wholesale distributor and their suppliers in the plumbing, heating, cooling and industrial and mechanical pipe, valves and fittings industries. ASA provides a forum for trading partners from around the country to discuss critical issues facing them, and offers a menu of products and services uniquely geared to their needs..
Midwest Distributors Association - www.mwda.net
The Midwest Distributors Association (MwDA) is the organization serving the Plumbing, Heating, Cooling and Piping (PHCP) industry in your area. By joining MwDA, you also automatically gain membership in the national American Supply Association (ASA). Membership in MwDA and ASA provides you with a regional and national alliance of industry colleagues, manufacturers, manufacturers representatives and other suppliers..