How to Actually Size an Infrared Heater for Your Bathroom
Let’s be honest: nobody likes stepping out of a hot shower into a freezing bathroom. It’s a shock to the system. But if you’re picking out an infrared ceiling lamp to fix that, you can’t just grab the first one you see. If you go too low on the wattage, you’re basically just installing a fancy lightbulb that doesn’t actually warm you up. Go too high, and you’ll end up with a “hot spot” that feels like a heat lamp at a buffet—scorching right under the bulb and chilly everywhere else. Finding the right power It mostly comes down to how much space you’re trying to heat. For a tiny powder room (under 4m²), a 400W to 600W lamp usually does the trick. If you’ve got a medium-sized bathroom (between 4m² and 8m²), you’ll want to bump that up to 800W or 1000W. If you’re dealing with a massive master bath over 10m², one lamp won’t cut it. You’ll either need a high-output array (1200W+) or a few lamps spread out. One thing to keep in mind: distance matters. Heat fades fast as it travels. If your ceilings are higher than 2.5 meters, you’ll need more wattage just to make sure the warmth actually reaches you before it disappears. The technical stuff (simplified) The cool thing about short-wave infrared is that it doesn’t bother heating the air—which is mostly useless in a damp bathroom. Instead, it heats you and the surfaces around you instantly. That’s why these use quartz glass tubes; they can handle the sudden jump in temperature without cracking. But here is the catch. You have to check your electrical panel. Slapping three 1200W lamps on one low-amp circuit is a great way to trip your breaker the second you turn them on. Double-check your wiring gauge before you commit to a huge setup. Where to put them Placement is everything. You want the heat where you actually spend your time. Think about the high-traffic spots—right over the vanity or just outside the shower. I wouldn’t put them directly over the bathtub, though. The steam can cause the glass to fluctuate in temperature too quickly, which isn’t ideal. If the room is big, don’t just bunch the lamps together. Stagger them. It stops those annoying cold pockets and makes the whole room feel cozy and even.