How to actually pick the right wattage for your bathroom heater
Let’s be honest: nobody likes stepping out of a hot shower into a freezing bathroom. It’s a shock to the system. When you’re picking out an infrared heater to fix that, the goal is simple—get enough heat to feel cozy without turning your bathroom into a sauna. Since these units are IPX4 rated, they can handle the occasional splash. But just because they’re waterproof doesn’t mean you can just guess on the power. If you get the wattage wrong, you’re either wasting electricity or shivering in a cold spot. Getting the size right It really comes down to how much space you’re dealing with. If you’ve got a tiny powder room (under 4m²), a 400W to 600W lamp is plenty. It warms you up instantly without making the air feel oppressive. For medium-sized bathrooms (4m² to 8m²), you’ll want to bump that up to 800W or 1200W. Just a heads-up: don’t go overboard. If you jam a 1500W lamp into a small space, you’re asking for a tripped breaker—or worse, a “hot zone” right under the lamp that feels like you’re standing too close to a campfire. It’s about the feeling, not the air Here is the thing about infrared: it doesn’t actually heat the air. It heats you and the walls around you. Because of that, where you put the lamp matters just as much as the wattage. You want that beam hitting you exactly where you stand. We stick with shortwave infrared for this because it works fast. You flip the switch, and you feel the warmth on your skin immediately. No waiting around. The catch: Power vs. Lifespan There is a bit of a trade-off here. Higher wattage means the filament is working harder and getting hotter. If the fixture doesn’t have great ventilation, that heat gets trapped in the housing. Over time, that can wear out the filament or even mess with the waterproof seals. You have to find that sweet spot where you’re warm, but the hardware isn’t struggling to breathe. A pro tip for the install Put these units on their own dedicated circuit. And if you can, add a dimmer or a timer. It lets you dial in the temperature perfectly. Plus, running a high-wattage lamp at 100% for hours is a great way to burn it out. A little control goes a long way in making your gear last.