How to actually pick the right wattage for your bathroom heater
Choosing a heater for your bathroom isn’t something you should just guess at. If you go too big, you’re basically throwing money away on your electric bill and risking a meltdown in the unit. Go too small? You’ll be shivering in your towel wondering why you bothered buying the thing. It really comes down to how much space you’re dealing with and how fast you want to feel that warmth. Getting the power right If you’ve got a tiny bathroom—something under 4 square meters—a 250W to 400W lamp is usually plenty. These are great because they beam the heat right at you. You aren’t trying to heat the air; you’re heating yourself. For those medium-to-large bathrooms (around 6 to 10 square meters), you’ll want to bump it up to 600W or 800W. But here’s a pro tip: instead of one massive heater, try a few smaller ones spread out. It feels much more natural. Also, look up. If you have high ceilings, remember that heat has a longer trip to make before it hits the floor. You’ll need a bit more punch to make up for that distance. The IP65 trade-off Now, let’s talk about that IP65 rating. In plain English, it means the unit is sealed tight against dust and water jets. Which is great for a steamy shower, obviously. But there’s a catch. Because it’s sealed, the heat gets trapped inside the housing. If you push too many watts into a small, sealed box, things get hot—fast. You have to make sure the housing is built to handle that thermal load, or you’ll end up burning out your lamp way sooner than it should. A quick word on wiring Before you go all out with high-wattage lamps, check your circuit breaker. If you slap three 800W lamps on one line, you’re pulling 2.4kW. That’s a lot of juice. Make sure your wiring is thick enough to handle it so you don’t deal with voltage drops or, worse, a tripped breaker every time you want a warm bath. My advice? Balance the load across a few different zones. It’s safer and just makes more sense for your energy bill.