Unsure if in working condition. The SIT 848 SIGMA Gas Valve Control Unit is designed to provide efficient control of gas flow to residential boilers. With a voltage of 31 VDC and an amperage of 7.7 VA, this unit is compatible with various heating systems. The sleek silver, brown, and green design adds a stylish touch to any home heating setup. Built by the trusted brand SIT, this gas valve control unit ensures reliable performance and energy savings.