Due to the eclipse, our Indianapolis, Bloomington, and Terre Haute branches will be closing at 1:00 PM Eastern and our Greensburg Branch will be closing at 4:00 PM. Please utilize the After Hours phones in case of emergency.
Erlanger, Kentucky
We will be opening the 13th branch location this summer in Erlanger, KY to service those customers South of the Ohio River! More details to follow!
When You Need a Compressor, Make Duncan Supply Your First Call
Duncan Supply Company is an authorized HVAC/R replacement compressor distributor for industry leaders Copeland, Carlyle, and Tecumseh.
Available 24/7
Erlanger, Kentucky
Opening this summer! More details to follow!
A2L Compatible, Professional Grade Vacuum Pump - Call your local branch or Duncan Sales Rep to learn more. -
We distribute replacement compressors for American Standard, Heatcraft, Hussmann, Scotsman, Bard, Bitzer, Embraco, and many more!

Vendor Spotlight

About Duncan Supply Company, Inc.

Since inception in 1936, Duncan Supply Company has taken pride in delivering the highest quality and best value to our customers. This philosophy has helped us grow into an industry leader, distributing a wide range of refrigeration, air conditioning, heating equipment, and accessories to customers, throughout central Indiana and Illinois.

LISTEN: An interview with our President and his story with Duncan Supply on a local podcast called Circle City Success

Why Duncan Supply Company

Truck Stock

Save yourself time & money by sending the properly stocked truck to your next service call. Click to learn more about MyTruck.

Line Card

Duncan Supply has an extensive list of vendor contacts within our industry. Click below to see all current relationships.


Click below to see all of Duncan Supply’s Featured Vendors and learn more about each product line.

Branch Locations

Events & Training

News & Promotions

Featured Vendors

Just as Duncan Supply has progressed from the use of crank telephones and note pads, to cell phones and e-mail, the increasing business usages of the Internet has challenged us all to harness the technology to provide state-of-the-art services to our customers.