Join Duncan Supply

Check out the news!

Check out the news! Don't forget to check back frequently under News & Promotions to see what Duncan Supply has to offer to you as a customer. And learn about the leading headline news in the HVAC/R industry.

News & Promotions

Want to Join the Family?

Duncan Supply Co. is the premier wholesaler for all HVAC/R equipment and supplies in the Indiana and Eastern Illinois areas. With approximately 200 vendors and 3,500 accounts including commercial, residential and food service contractors, health care institutions, school corporations, and colleges and universities, Duncan Supply offers a wide variety of products to suite all of your HVAC/R equipment and service parts needs.

Duncan Supply also offers a wide variety of educational opportunities at all of our branch locations, being conducted by certified instructors as well as our vendor specific courses. 

Interested in partnering with Duncan Supply? Follow the above links to start the process as a new customer or a new vendor.