Cambridge Engineering announces the addition of a remote-control station that increases energy savings of its SA-Series units from 40 to 70 percent compared to traditional systems. CE-Smart includes controls for heating and ventilation and can be interlocked with external signals, including CO detectors, to maintain IAQ. It includes a lockable NEMA 1 enclosure equipped with a three-position selector switch (Summer Ventilation, Off and Heating); combination seven-day programmable timer and setback thermostat; an override timer; intermittent/continuous control; and indicating lights for blower operation (green), burner operation (red) and reset (amber). Sensors for the thermostat and gas modulation system also are provided.