How to actually size infrared heaters for your bathroom
When it comes to picking infrared lamps for your ceiling, don’t just grab the one with the biggest number on the box. It’s not about raw power. It’s about making sure the heat actually reaches you. If you go too heavy, you’re just burning money and potentially stressing out your ceiling materials. But if you go too light? You’ll be standing there shivering because the heat vanished before it ever hit the floor. Getting the wattage right It mostly comes down to how much space you’re dealing with. For a tiny powder room (under 4m²), a single 250W to 400W lamp usually does the trick. If you’ve got a medium bathroom—somewhere between 4m² and 8m²—you’ll probably want to bump that up to 600W or 800W. Now, for those big master baths over 10m², here is a pro tip: don’t just install one massive 1500W monster. You’ll end up with one scorching “hot spot” and the rest of the room feeling cold. Instead, spread out a few 400W lamps. It creates a nice, even blanket of warmth that feels way more natural. The “Line of Sight” rule Here is the thing about infrared: it doesn’t really heat the air. It heats whatever it can “see.” This means your ceiling height matters a lot. A lamp sitting at 2.4 meters feels very different from one at 3 meters. The higher the ceiling, the more wattage you’ll need to make sure you actually feel that warmth on your skin. Wires, bills, and common mistakes Keep in mind that high-wattage lamps pull a lot of juice. If you’re putting 1000W+ units into an old house, please check your wiring first. You don’t want your copper wires running hot inside the walls. To keep things comfortable (and keep your electric bill from spiking), I highly recommend using timers or thermostats. It stops the room from turning into a sauna. And one last thing—keep your lamps away from the ventilation ducts. There’s no point in paying to heat the air only to have your exhaust fan suck it straight outside.