This ZVS 16DV is a dual voltage, 16A enclosed compact energy regulator for manual proportional control of power to resistive loads using variable bursts of energy. The burst firing circuit provides trigger pulses coincident with the mains polarity crossover, ensuring complete sine wave cycles are passed through to the resistive load. This prevents fast changes in load current and inhibits RFI which is normally found with switches, relays and phase angle fired triacs or similar devices. The output is block bursts with a full 0 to 100% range. Applications are virtually all resistance heating loads including ovens, furnaces, hot plates, extruders, moulders, space heating, boilers, dryers soldering pots and irons, heating tapes, stress relieving, smelters and heating mantles.