How to actually pick the right wattage for your bathroom heater
Let’s be honest: nobody likes that freezing shock the second you step out of a hot shower. But when you’re shopping for infrared lamps, the instinct is usually to just buy the most powerful one on the shelf. That’s actually a mistake. If you go too big, you’re just throwing money away on your electric bill—or worse, you’ll trip a breaker. Go too small, and you’re still shivering. The trick is just matching the power to the actual size of your room. Finding your sweet spot If you’ve got a tiny powder room (anything under 4m²), keep it simple. A single 250W to 400W shortwave lamp is plenty. It’ll warm you up instantly without turning the room into a sauna. For those mid-sized bathrooms (between 4m² and 8m²), you’ll want to jump up to 600W or 800W. Here’s a pro tip: instead of one giant lamp, try splitting the power between two smaller ones. It stops those annoying “hot spots” where one corner of the room is roasting while the other is still chilly. Then you have the big master baths—the ones over 8m². For these, you’re looking at 1000W or more. But keep an eye on your ceilings. If they’re higher than 2.7 meters, you’ll need extra wattage just to make sure the heat actually reaches you by the time it hits the floor. The trade-offs you should know about Higher wattage means the heat hits you faster. Like, seconds faster. But remember, more power means more pull on your wiring. If you’re planning to install a few 800W lamps in one area, it’s worth double-checking your cables and your breaker box first. You don’t want the lights going out right as you’re getting warm. The best part about shortwave infrared is that it doesn’t bother heating up all the air in the room. It just warms you. Because of that, you don’t need to blast the whole space. Just point the heat where you actually stand. It’s a much smarter way to stay warm without letting your electric bill spiral out of control.