On the line, you can’t afford to guess at timing and temperature. A coated windshield comes out of wash, and that residual moisture has to be gone before it hits the lehr or autoclave. If it isn’t, the water flashes to steam, blisters the coating, and the part gets scrapped. We built an infrared tunnel that dries glass in-line with controlled heat, and it fits into tight floor layouts. What matters under the hood We spec short-wave NIR emitters tuned to the absorption band of water and the common organic coatings we run. That gives you fast heat transfer into the film and the glass surface without overdriving the body. Zone control keeps the thermal profile flat across the belt, so you get edge-to-edge drying and warp stays within spec. The emitters run on 230/460 V, drop into standard conveyor widths, and mount as modules that integrate cleanly with OEM presses and coaters. Output stays stable past 5,000 hours, with less than 5% derating, and response is measured in seconds. Why it plays in our plants No line runs just one process. The same tunnel handles coating drying after wash, preps glass for lamination by killing surface moisture, and conditions parts before insulating glass sealing. On tempering lines, it preheats consistently, which cuts thermal shock and reduces edge defects. You also save energy because the heat goes straight into the film and water, not into heating the air around it. Cycle times shorten, rework drops, and yield climbs. Here’s what to watch for NIR drying is line-of-sight. Reflections off bright surfaces and shadows from dense fixtures will give you uneven heating. Plan the layout so the emitter face has a clear view of the glass, and use masking or shielding where needed. The system tolerates ambient from 10°C to 40°C, but keep the inlet air clean and dry. And matching the emitter spectrum to your coating emissivity is key—share your film stack and line speed early so we get it right.