Low-pressure boilers operate at pressures less than or equal to what for steam?

Low-pressure boilers are specifically categorized by their operating pressure, which is typically defined as being below a certain threshold for safety and regulatory purposes. In the context of steam boilers, the classification of low-pressure systems is generally accepted to be those that operate at pressures less than or equal to 15 psi. Understanding this distinction is important for HVAC professionals as it affects the design, operation, and maintenance of boilers.

Operating at or below 15 psi allows these systems to avoid the more rigorous safety regulations that accompany higher pressure systems, while also ensuring safe and efficient operation. This level of pressure is suitable for many heating applications, particularly in residential and light commercial settings, where the demand for steam heat does not require high pressures. The consideration of safety, efficiency, and the type of applications served makes recognizing the 15 psi threshold critical for anyone working with steam systems.