tekmar Control Systems’ Boiler Control 275 is designed to stage up to four condensing or noncondensing modulating or on-off boilers using Proportional, Integral, Derivative staging to accurately maintain temperature. Water temperature is controlled by outdoor temperature reset for space-heating applications or a fixed setpoint for domestic hot water tank heating or industrial process heating applications. It is tekmarNet communication-compatible, allowing for Internet connectivity. www.tekmarcontrols.com