If your fireplace, stove, or gas logs aren't working properly, this 0820652 millivolt gas valve might be the solution you need! This combination gas control is designed specifically for natural gas direct vent applications and works without requiring main electrical supply - it operates on millivolt power generated by your thermopile. It replaces multiple part numbers including 37D0117, R7577, 0820634, 0820644, 0820654, 0820655, 0820662, 0820704, 0820706 and 0820952. Compatible with Majestic, Monessen, IHP, Lennox, Empire, HHT, Tavis Industries, and Napoleon fireplaces and stoves. The multifunctional control includes thermoelectric flame supervision (safety shut-off if flame goes out), restart interlock, servo pressure regulator, and automatic shut-off valve features. Whether you're a professional technician or a knowledgeable DIYer, this valve provides the reliability needed for safe fireplace operation. Always remember to turn off gas supply and consult professional if you're unsure about installation. Bring your fireplace back to life with this quality replacement part and enjoy cozy nights without worrying about safety issues. Your fireplace deserves quality components, and this valve delivers exactly that!