The Innsbrook Vent-Free Insert is the perfect "zero-clearance" solution to maximize the heat output of a vented fireplace. For fireplaces with damaged or unserviceable flues, missing or leaky dampers. With a built in blower system, the Innsbrook insert gets the heat into the room. Different sizes and trims are available to meet a variety of needs. Available in Natural Gas, or Propane, in either IPI (intermittent pilot ignition) or Millivolt (on/off remote ready, with a standing pilot light) control systems. Remotes are available for either control type, but are both packaged with an on/off switch.