Premier Wholesale HVAC & Food Service Equipment Distributor

Duncan Supply has been the premier wholesale distributor of refrigeration, air conditioning, and heating equipment in central Indiana and Illinois

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Hiring in Elkhart!

Duncan Supply is now hiring for the warehouse in Elkhart! Guaranteed full-time hours, full benefits, and a great start into the HVAC/R industry. 

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eCommerce Online Store

Sign-up for Duncan Supply's eCommerce Online Store with over 13,000 online items in real time stock status at each branch location.

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Nu-Calgon's Rx-flush

The entire Rx11-flush product family is available at Duncan Supply.  

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Nu-Calgon Coil Cleaners

Introducing Nu-Calgon's Newest Aerosol Cleaner .... Blackhawk!

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Vendor Spotlight

Events & Training

Branch Locations

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Become a Vendor

Have new innovating products that Duncan Supply Company needs to sell?  Start the process below to become a vendor of Duncan Supply Company.

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Become a Customer

Interested in becoming a customer of Duncan Supply Company?  For more information, click below to start the process.

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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.

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