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AAON builds heating and cooling equipment for commercial buildings like schools, stores, and factories.
AAON makes the big metal boxes you see on rooftops of stores, schools, and factories. Those boxes heat and cool the building, and they also bring in fresh air. AAON sells them to commercial and industrial customers — not to homeowners — mostly through a network of independent sales reps and distributors who know local building codes and contractors.
The company's main product is the rooftop unit, a single packaged box that does heating, cooling, and ventilation all in one. AAON also sells custom-built air handling units and modular outdoor units for bigger or unusual jobs, like data centers, cleanrooms, or buildings where standard equipment won't fit. That custom work matters: AAON engineers units to order, which lets it charge more than makers of plain off-the-shelf equipment. Its competitors include Carrier Global, Trane Technologies, and Johnson Controls, plus a long list of smaller regional players. AAON's edge is boring but real: it builds in the United States, mostly at plants in Tulsa, Oklahoma, where it was founded, and in Longview, Texas. That domestic footprint helps it dodge import tariffs and supply-chain chaos that hit rivals who source parts overseas. Customers pay a premium for AAON equipment because it is efficient and reliable, and because the units are easier to service over their long life.
The business has grown fast. Revenue rose from roughly $500 million in 2019 to about $1.2 billion in 2023, and the company has kept building new factory space to keep up with demand. It pays a small dividend but mostly plows cash back into capacity and product development. The risk is simple: AAON sells into construction markets, so when new buildings slow down, orders slow down too — and the company is spending heavily on factories right when interest rates have made building projects more expensive.
Saved answer · last researched 15 Nov 2026