We built this attic heater around a shortwave halogen lamp for one reason: to pack serious heat into tight spaces. No bulky convection unit. Just focused warmth where you need it. Here’s the heart of it: a 2500W element running on 400V, tucked inside a 300mm tube. That short length is the secret. It keeps the footprint small enough to slip into cramped housings and ductwork. You get a lot of power in a small package. Just remember, that kind of heat density needs proper airflow and heat sinking in the surrounding chassis. The halogen lamp keeps the filament running hot and steady. And the quartz envelope handles wild temperature swings without cracking. We added a reflective coating to push infrared energy forward, so more heat goes where you point it, and less is wasted to the sides. And the R7s connector? It makes swapping the lamp quick and tool-free. No wrestling with clips or worrying about loose terminals. Just a solid, reliable connection. Let’s talk about where this shines: tight spaces. Attics, in particular. You need heat where you can actually run the wires, not where you wish you had room. This heater slips in, heats up fast, and holds steady even with constant cycling. But here’s the trade-off. The output is high, so your mounting surface and wiring need to be rated for the temperature and current. Plan your installation with proper clearances, and you get reliable, focused heat that keeps the space dry and protected.