A Practical Look at automotive heater duct hose After spending a good chunk of my career working alongside engineers and technicians in automotive manufacturing and aftermarket supply, I can say that the humble heater duct hose doesn’t get nearly enough credit. Frankly, it’s one of those parts that’s quietly crucial — no flashy tech, no high-octane hype — just consistent performance delivering warm air on cold mornings, season after season. So what makes an automotive heater duct hose stand out? It’s more than just a flexible tube connecting the heater core to your vehicle’s vents. The right h…