Stop Fighting “Zebra Stripes” in Your Wide-Format Low-E Glass
If you’re running a lehr wider than 3 meters, you already know the struggle. Trying to get a perfectly even heat profile across a sheet that size is a nightmare. Standard, off-the-shelf lamps just aren’t built for it. They leave you guessing. That’s why we build custom, continuous infrared heating units. We design them specifically for those massive footprints so you can actually stop worrying about your thermal map. The problem with “just making it longer” You can’t just stretch a quartz tube to 3 meters and call it a day. If you do, you’ll run into voltage drops and annoying cold spots. That uneven power density leads to thermal stress, and in the Low-E world, that’s a recipe for disaster. We handle this by obsessing over the wattage-per-centimeter. We dial it in precisely so the coating hits the exact temperature it needs, without cooking the edges of the glass. Fighting the sag Here is the thing about long tubes: they want to bow. When they get hot, they get soft, and they start to sag under their own weight. To fix that, we use heavy-wall quartz tubing. It’s tougher. We also add reinforced support brackets and specialized end-caps to keep everything dead straight. Plus, we go with high-voltage configurations. It keeps the current manageable and takes a lot of the stress off your wiring. The reality check These units are a direct fit, but there is one thing you need to watch out for. A 3-meter continuous array puts out a lot of heat. If your exhaust fans aren’t up to the task, that heat builds up and can fry your lamp sockets. Just make sure your cooling system can breathe. Once that’s sorted, it’s simple. You wire them up, set your controllers, and you’re done. You get a flat, consistent heat map across the entire sheet. No more patchwork arrays of short lamps. No more “zebra stripes” ruining your coating. Just clean, consistent glass.