The Old Furnace Repair That Proved Nothing

A man in Calumet pointed at the furnace in his basement and told me they do not make them like they used to. It was forty-one years old and still running. He was certain that furnace was proof the old way was the better way, and that modern furnaces, with their control boards and variable-speed motors, were over-engineered junk that would never last. I think about Abraham Wald every time I hear that. In 1943, the military wanted to armor their bombers where the returning planes had the most bullet holes. Wald told them they were looking at the wrong planes. The ones hit in the fatal spots never came back to be counted. The holes on the survivors marked the places a plane could take a hit and still fly home. That old furnace is the plane that came back. The man cannot see all the furnaces from that same era that failed and got hauled to the scrap yard twenty and thirty years ago. They are not in his basement to point at. He sees the one that survived, and he sees it because it survived. What kept his furnace alive is not mostly the design of that era. It is the specific history of that one unit: a dry conditioned space, a dedicated circuit, stable voltage, correct airflow, and a homeowner who changed filters. Most of that production run got less ideal care, and most of it failed. His is the rare one. The same trap runs backwards on new equipment. Somebody reads about three control boards that failed in a bad batch and concludes every high-efficiency furnace is junk. The three complaints are visible. The hundreds of thousands of boards running fine for years are invisible, because nobody writes a post about the part that just works. So I do not argue a man out of loving his furnace. I honor the survivor without ratifying the conclusion. I tell him the Wald story, because the image of armoring the wrong planes lands in a way a statistics lecture never will. His furnace is real. What it proves is only that it survived. Core line: "The old surviving furnace was selected by survival. The complaining forum post was selected by failure. Neither one is representative of the underlying population." Give Us A Shout Thanks for tuning in to Hartzell's Heat & Air, HVAC in Kingfisher and central Oklahoma. From Kingfisher to coast-to-coast consulting, we design, install, and maintain smart, efficient systems that deliver year-round comfort. We're family-run and powered by 47+ years of experience. Whether it's AI-powered thermostats, geothermal systems, or classic tune-ups, we deliver upfront pricing, expert care, and warranties that back it all up. 🛠️ Book Online:Book Online🌐 www.hartzellsheatair.com📞 (405) 375-4822 🚛 Trane Comfort Specialist • Mitsubishi Diamond Dealer • ClimateMaster Elite🛡️ VIP Comfort Club • Remote Monitoring • Extended Warranties 📲 Follow us for tips, updates, and real-world installs:YouTube: @hartzellsheatair6003X: x.com/HartzellsHVACFacebook: facebook.com/hartzellsheatairLinkedIn: Dave Hartzell Built on trust. Backed by warranty. Designed for comfort.