Stationary engineers and boiler operators typically do the following:

• Operate engines, boilers, and auxiliary equipment
• Read gauges, meters, and charts to track boiler operations
• Monitor boiler water, chemical, and fuel levels
• Activate valves to change the amount of water, air, and fuel in boilers
• Fire coal furnaces or feed boilers, using gas feeds or oil pumps
• Inspect equipment to ensure that it is operating efficiently
• Check safety devices routinely
• Record data and keep logs of operation, maintenance, and safety activity

Most large office buildings, malls, warehouses, and other commercial facilities have extensive heating, ventilation, and air-conditioning systems that maintain comfortable temperatures all year long. Industrial plants often have additional facilities to provide electrical power, steam, or other services. Stationary engineers and boiler operators control and maintain these systems, which include boilers, air-conditioning and refrigeration equipment, turbines, generators, pumps, and compressors.

Stationary engineers and boiler operators start up, regulate, repair, and shut down equipment. They monitor meters, gauges, and computerized controls to ensure that equipment operates safely and within established limits. They use sophisticated electrical and electronic test equipment to service, troubleshoot, repair, and monitor heating, cooling, and ventilation systems.

Stationary engineers and boiler operators also perform routine maintenance. They may completely overhaul or replace defective valves, gaskets, or bearings. In addition, stationary engineers and boiler operators lubricate moving parts, replace filters, and remove soot and corrosion that can make a boiler less efficient.