Ever feel like those old screens were silently judging you?

Airflow is one of those sneaky things nobody thinks about until theyve been fighting a job for two hours. Wind screens are cheap and easy to rig, but most crews would rather swap out three thermocouples and cuss at the chart than admit a fan or a draft is the real problem. Even a light breeze can pull heat off the surface way faster than people expect, especially on bigger joints where the mass is already working against you. That little box fan story hits close to home because Ive seen guys set up heaters next to open doors or vents and then wonder why their interpass temps keep dropping. Once you start treating the air around the weld like part of the setup, those charts actually start behaving.