We built this wall-mounted patio heater for engineers who want serious heat in a tidy package. Something compact, powerful, and that wires up clean. It’s meant to live outside and just keep working, no drama. It’s a quartz halogen unit, and that matters. It throws direct radiant heat—so you feel the warmth instantly, without wasting energy heating the air around it. Here’s the technical bit, made simple. It runs at 2500W, powered by a 400V supply. That voltage choice keeps the current lower than a 230V design, which means you can use smaller wiring and avoid voltage drop over the run. The tube is about 300mm long, so it takes up minimal wall space while still delivering a focused, directional heat pattern. The core is built around a quartz envelope, because it handles rapid heating and cooling without blinking, keeping output steady. Halogen chemistry keeps the filament stable, which helps it last longer than standard infrared lamps. And the tube uses an R7s connector—an industry-standard fit. When it’s time to replace it, it’s a straight swap. No fuss. The reflector coating is designed to push heat forward, so you’re not wasting energy. This setup is for wall-mounted outdoor comfort, where you need a lot of heat from a small footprint. It wakes up fast, delivers consistent radiant warmth, and the compact size keeps the installation tight. One thing to keep in mind: 2500W at 400V means it puts out serious heat. So plan the mounting spot and nearby controls carefully to keep everything running cool.