Most of Reimers boilers are built with controls to step in and out the power circuits at selected time delays. This permits a gradual power draw and is more effective at smooth transition. Incremental electrical power control steps of 15, 20, 30, or 60 kw is typical. Where more finite control is desired the SCR option can provide a 0-100% output of an element's kw rating. Two SCR circuits are an option. Boilers are available in low and higher psi operation. ASME Sect 1 and Sect 4 builds are available.