Maxitrol MR212DH-1212

<b>Maxitrol MR212DH-1212 1-1/2"Negative Pressure Selectra Modulating Valve</B><br>Maintaining consistent temperatures is no longer a problem. The unique Modulator or Modulator / Regulator valve, the heart of the Selectra Electronic Gas Flame Modulating System, provides precise, non-fluctuating, instantaneous temperature control without requiring any motor or mechanically driven butterfly valve.