The Only HVAC Supplier with Field Service Support Who Show Up on Your Job Site.
Talk to Your Local
Supply Expert
A local rep will contact you within 1 business day.
From factory-backed Trane & American Standard to all the right SKUs with quick delivery and job site support, O’Connor is the partner thousands of contractors have trusted for over 100+ years to get the job done. Get started today by completing the form or call your local branch to speak with a supply expert now.
On-Site
Tech Support
Field reps visit your job site for design help, troubleshooting, and installation support.
Why Contractors Choose O'Connor
Business Partner, Not Just Supplier
Get P&L insights, labor planning, and profitability strategies.
Contractor
Training
Keep your crew certified and ahead of the curve with hands-on courses and technical education.
State-of-the-Art E-Commerce
24/7 online ordering with live inventory, one-click reorders, and shipment tracking.
Exclusive Trane & American Standard Distributor
The only place in the Midwest to get these industry-leading brands.
Quick & Flexible Delivery
Our team prioritizes fast, flexible fulfillment so your jobs stay on track.
Talk to a Supply Expert Near You
Shop 10,000+ Ready to Order HVAC SKUs
The most in-demand categories and brands contractors rely on. We carry many more in our full catalog.
Furnaces
Air Handlers
Heat Pumps
Featured Categories
Controls & Boards
Coils & Compressors
Rooftop Units
Choose from thousands of SKUs across more than 200 leading HVAC brands.
“100+ Years. Thousands of Contractors. One Trusted Partner.”
Since 1920, O’Connor has built multi-generational relationships with contractors across the Midwest.
“Craig was a lifesaver. Genuine, respectful, and took the time to walk through the system. He went above and beyond.”
— Cody G.
“They always go above and beyond for all of your HVAC needs.”
— Nate C.
“Always has parts available that no one else has, also better priced.”
— Nicholas R.
“If I could give them 10 stars I would. 20 mins in and out.”
— Kenan C.
“What a great group of people. Lori, Joseph, Stephen, and Patrick were all super helpful and got my issues resolved.”
— First Choice Heating Cooling
