AAON engineers and builds semi-custom commercial HVAC — rooftop units and coils — and, through its BASX brand, custom air-side and liquid cooling for hyperscale data centers. It sells through independent manufacturer reps, competes with giants like Trane and Carrier, and has ridden the data-center boom to record 2025 sales of $1.44B and a $1.83B backlog.
From steel to a cooled data center
AAON buys metals, compressors and refrigerants, engineers them into rooftop units, coils and BASX data-center cooling in Tulsa, Longview and Redmond, then sells through independent reps to buildings and hyperscalers — competing with giants like Trane, Carrier and Vertiv.