Picking the Right IR Heater Wattage for Your Bathroom
When you’re picking an infrared heater for a bathroom, you don’t want to just guess and hope for the best. It’s all about the size of the room. In an IP55-rated fixture, the goal is simple: get the room warm quickly without blowing a fuse or turning the bathroom into a sauna. How much power do you actually need? Think about the square footage. If you’re dealing with a tiny powder room (under 4m²), a 250W to 400W lamp is plenty. Honestly, putting a 600W unit in a space that small is just wasting electricity. Plus, it can actually make the fixture housing get too hot. For those medium-sized bathrooms (between 4m² and 8m²), you’re usually looking at 600W to 800W. Then you have the big master baths or wet rooms—anything over 10m². For those, you’ll want 1000W+ units or maybe a few lamps spread out to keep the warmth consistent. Here’s the catch: if you go too low on the wattage, the lamp will just run non-stop trying to reach the temperature you want. That’s a great way to burn out the filament way sooner than it should. The IP55 Trade-off Since these units are IP55-rated, they’re built to handle dust and splashes of water. To do that, the chassis has to be sealed tight. But there’s a downside. Because it’s sealed, the heat can’t escape as easily as it would in some big industrial heater. If you cram a massive wattage lamp into a small, sealed housing, the internal wiring can start to degrade over time. That’s why I always suggest shortwave IR lamps for these setups. They heat you up directly, rather than trying to bake the air in the room. It’s just more efficient. A quick word on your electrics Higher wattage means you get warm faster, but it also means a bigger hit to your power draw the moment you flip the switch. If you’re wiring a few of these into one zone, keep an eye on your breaker. A single 1000W lamp gives you that instant heat, but it puts a lot more stress on your electrical system than two 500W lamps spread across the ceiling. It’s often a smoother way to go.