Getting Infrared Heat Right in Wet Zones
If you’re putting infrared heaters in a bathroom or a damp workshop, a basic waterproof cover isn’t going to cut it. You’ve got high-wattage elements working hard in a place where steam and condensation are basically hunting for any way to ground themselves. To keep things safe and actually working, you have to obsess over where the lamp meets the power supply. Dealing with the moisture problem Here’s the thing: in a humid room, a thin film of water forms on the quartz glass and ceramic parts. It creates a little bridge that lets electricity leak where it shouldn’t. To stop that, we stick with high-grade alumina ceramics for the end-caps. They don’t soak up water. If you go cheap here, the insulators act like sponges. One steamy shower and your RCD will trip, leaving you in the dark and cold. Locking down the connections Most failures happen right where the wiring hits the lamp. It’s the weakest link. We don’t trust simple plastic housings. Instead, we use IP65-rated enclosures and seal everything up with gaskets and adhesive-lined heat-shrink tubing. The goal is to keep those terminals bone-dry. Plus, we use silicone-insulated cables. They can take the heat from the lamp without cracking. If the insulation cracks, moisture creeps right up the wire and into your junction box. Not a good look. The balancing act But there’s a catch. If you seal everything too tight, you trap the heat. You’re protecting the electronics from shorts, but you might accidentally cook the wiring from the inside out. It’s a bit of a tug-of-war. You need a chassis that keeps the water out but still lets the unit breathe. You have to find that sweet spot where the air moves, but the droplets don’t.