iOS App Now Available

Duncan Supply Mobile is now available in the iOS App Store for iPhones & iPads!

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Android App Now Available

Duncan Supply Mobile is now available in the Google Play Store for all Android devices

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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.

Enter eCommerce

Reznor Unit Heaters

In stock at Duncan Supply!  Call your Duncan Supply rep for more information. 

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Reznor HVAC Application Training

Learn how to properly size & apply MUA's and DOAS's; New Product Information; and Complete Product Line Review

Link to Registration Form

Vendor Spotlight

Events & Training

Branch Locations

View a map of our branches

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.

Start the process

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.

View Our Featured Vendors