The Imperial 1037 Range Air Shutter regulates the amount of primary air entering the burner mixture on compatible commercial gas ranges. Its adjustable opening changes the proportion of air combined with gas before combustion, allowing the burner mixture to be set according to the equipment specification. The shutter is positioned around the burner’s air inlet and is adjusted at the burner assembly rather than through the range control panel. Proper positioning affects the flame characteristics produced at the burner ports.