30,000-BTU natural-gas wall heater for spaces up to 1,000 ... piezo ignition system provides easy start-ups 30,000-BTU natural-gas wall heater for spaces up to 1,000 square ... ups; radiates instant infrared heatSafe-watch pilot assembly, built-in oxygen-depletion sensor, and pressure regulator for safetyVariable heat control; wall ... 3/5 by 23 inches 30,000-BTU Vent-Free Natural-Gas Infrared Wall Heater