The One Who Already Knows
Dave Hartzell has been an HVAC technician for 45 years. Ninety thousand service calls. He has worked in places most people never see ΓÇö gas plants, oil rigs, hospital cell preservation systems, high-rises across the DFW skyline, cattle feedlots with millions of dollars of livestock depending on the temperature holding, walk-in freezers large enough to dock four semi trucks, sprint telecommunications facilities, and tens of thousands of residential homes across central Oklahoma and beyond, every environment you can name. Every kind of person is there. When you spend 45 years showing up at…
The skinny
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