Heater automatically adjusts wattage output and blower speed for whisper-quiet operation and optimum comfort Heating element is heavy-duty, non-glowing steel fins brazed to steel sheathed tubular elements placed in grid pattern that covers the entire discharge area Automatic fan delay eliminates cold drafts on start-up and discharges residual heat from the heater body during shut down SmartSeries Digital Thermostat: 5/2-day programming with four periods per day Contemporary, clean design with easy to use LED touch screen Easy installation - heater is mounted prior to wiring. Both hands are free to make field connections in spacious compartment