Getting Your Bathroom Heat Right: A Guide to IR Wattage
If you’re putting infrared heat in a bathroom, you already know you need that IP55 rating. It’s the non-negotiable part—it keeps the steam and dust from frying your circuits. But once the safety stuff is sorted, you’ve got a bigger question: how much power do you actually need? Get it wrong, and you’re either shivering in a cold room or feeling like you’re standing inside a toaster.
Matching the Power to the Space
It really comes down to how much air you’re trying to deal with. A tiny powder room is a different beast than a master bath with a massive walk-in shower. For those small spaces (under 4m²), a 250W to 400W lamp is usually plenty. You don’t want to go overkill here. If the wattage is too high, the room heats up way too fast, and your thermostat will just keep clicking on and off every two minutes. It’s annoying and wears out the gear. Now, if you’re dealing with a larger room—say 6m² to 10m²—you’ll want to jump up to 600W or 800W. Here’s the trap: if you go too low in a big room, the lamp just runs and runs, struggling to ever hit the temperature you want. That’s a quick way to burn out the filament.
It’s All About Where You Put It
Here is the thing about short-wave infrared: it doesn’t actually warm up the air. It warms up whatever it hits. You. Your towel. The floor. Because of that, where you hang the lamp matters way more than how many watts it has. Put them exactly where you’re actually going to be standing. But be careful with “monster” units. A massive, high-wattage lamp in a tight spot creates a scorching hot spot that feels uncomfortable. I’ve found it’s much better to use two smaller lamps spread apart. It gives you a nice, even glow instead of one blast of heat.
The Trade-off: Speed vs. Your Fuse Box
Sure, high-wattage lamps get you warm faster. But there’s a catch. When those heaters kick in, they pull a lot of current all at once. If you’re wiring up a few IP55 units on one zone, keep an eye on your breaker. If you overload the circuit with too many heavy-hitters, you’ll be tripping your safety switches the second you flip the switch. Not exactly the relaxing start to a morning you were hoping for.