HeatPak integrates a valve train and control box to provide a burner system that meets NFPA requirements. The system includes a double valve with gas pressure switches, Veri-Flame modulating flame monitor and ignition transformer. HeatPak can be used on burners with 0.5 to 2" piping up to 6 million BTU/hr inputs and offers two standard selections. One option includes a choice of scanner or flame rod. Another includes a choice of proof of position using either switches on the burner or auxiliary contacts incorporated within the ACT004 rotary actuator.