Comes with a millivolt valve with a standing pilot and variable flame remote control via remote. The general rule of thumb when picking a fireplace insert is leaving 3-5 inches on either size of the unit to the firebox wall. This will most likely ensure proportionate sizing, but there are some exceptions. For Standard sets - 24" / 30" (width)

Manual valve with a standing pilot options are available as well, call for pricing as well.