Stop Guessing Your Bathroom Heat
I see it all the time. Engineers will spec the exact same wattage for every single bathroom on a floor plan, regardless of whether it’s a tiny powder room or a massive master suite. It’s a mistake. You end up with one room that feels like a sauna and another where you’re still shivering in a towel. If you want the setup to actually feel good, you have to look at the room’s size and where you want the heat to land.
Finding the Right Power
If you’re dealing with a small bathroom—anything under 4m²—you don’t need a powerhouse. A 400W to 600W shortwave lamp is usually plenty. Go any higher and you’ll probably overheat the space in a few minutes, which isn’t exactly the “relaxing” vibe people want. For those mid-sized rooms (between 4m² and 8m²), you can bump it up to 800W or 1000W. But here is a pro tip for the big luxury baths or those open wet rooms:**don’t just buy one massive 2000W lamp.**That just creates one scorching hot spot while the rest of the room stays chilly. Instead, wire up two or three 600W lamps and spread them across the ceiling. It feels way more natural, like a warm blanket of heat rather than a heat lamp at a buffet.
Where to Put Them (and Why)
Infrared is all about the line of sight. If a shower curtain or a tall vanity is blocking the lamp, that wattage is basically useless. I usually suggest mounting them about 2.2m to 2.5m up. The cool thing about shortwave lamps is that they hit your skin and the surfaces around you instantly. They don’t waste time heating up the air. That’s why you feel that immediate “ahhh” moment the second you step in, even if there’s a draft in the room. Just a heads-up: more power means more pull on your electrics. Double-check your circuit breaker before you start hanging multiple 1000W units in one zone. Nobody likes a tripped breaker in the middle of a shower.
A Quick Warning on Burnout
It’s tempting to just go for the highest wattage to get things warm faster. But there’s a trade-off. When you push too much power through a small quartz tube, you’re stressing the hardware. It’s like redlining an engine—you might get there faster, but you’re going to shorten the lamp’s life. Keep the power balanced with the size of the fixture so you aren’t replacing bulbs every few months.