How to actually size your bathroom heater (without wasting money)
If you pick the wrong wattage for your bathroom heater, you’re basically choosing between two annoying options: paying for electricity you aren’t using, or shivering in a cold room. Here is the secret: we use short-wave infrared. Instead of trying to warm up the actual air—which is a losing battle when you’ve got cold tiles and damp walls—the heat goes straight to you. It’s like stepping into a patch of sunlight on a winter day.
Getting the wattage right
You’ve got to look at how much space you’re actually dealing with. If you’ve just got a tiny powder room (under 4m²), a 400W to 600W lamp usually does the trick. But if you’re tackling a full master bath (around 8m² to 12m²), you’ll want to jump up to 800W or 1200W. But be careful. Putting a 1200W beast in a tiny closet-sized bathroom is a bad move. The unit will just click on and off constantly, which wears out the relay and kills the lamp way faster than it should. Also, look up. If you have high ceilings, you’re losing more heat to the rafters, so you’ll probably need a bit more power to feel that same cozy warmth on your skin.
The “wet zone” stuff
Since this is a bathroom, water is the enemy. That’s why the IP rating is the only thing that really matters here. We use sealed quartz glass and connectors that don’t mind a bit of moisture so you don’t have to worry about shorts. Just a heads-up on the electrics: more wattage means a heavier pull on your power. If you’re planning to install a few 1200W units on one circuit, double-check your wire gauge. Nobody wants to trip the breaker right in the middle of a shower.
Intensity vs. Comfort
There’s a bit of a trade-off here. High-wattage lamps create a very intense, concentrated zone of heat. It’s great if you want to warm up instantly, but it can feel a bit oppressive if the lamp is mounted too low. For the most natural feel, play around with the height. Sometimes a lower-wattage lamp mounted closer to where you actually stand feels way better than a high-power unit blasting you from ten feet up.