A heavy oil boiler is an industrial boiler that uses heavy fuel oil as the main fuel to produce steam or hot water. Compared with light oil, heavy oil has higher viscosity, higher density, and usually contains more sulfur, ash, water, and other impurities. Because of this, a heavy oil boiler normally needs fuel heating, filtration, stable oil supply, proper atomization, and sometimes desulfurization or denitrification equipment.

Yes — a steam boiler can be used for heating. That said, it’s not always the best option, and whether it makes sense depends on how and where the heating is used.

For any facility relying on steam for process heat, sterilization, or power generation, the gas-fired steam boiler is a critical yet often costly asset. Its total lifetime financial impact extends far beyond the initial purchase, weaving through installation, daily operation, and long-term maintenance.

I cover how each type works, how to tell them apart (including what to look for in photos), their pros & cons, and why water-tube boilers generally give higher efficiency.

A skid-mounted boiler is a factory-built, pre-assembled steam or hot-water boiler system mounted on a steel skid (frame) that includes the boiler and its auxiliary equipment for fast, compact, and portable installation.

99.5% efficient electrode boiler vs. 96% efficient gas-fired steam boiler. Cost analysis to determine the optimal operating strategy.