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Totaline P374-2800 Programmable Thermostat (was P374-2200) Features: -Auto Changeover, 2-Stage Heat/Cool for use with gas/electric, electric and hydronic heat -Dual-Setpoint with adjustable deadband, setpoint adjustment range from 35° - 99° F -7 day Programmable with up to 4 Time Periods per day, with copy command for easy programming -Holiday programming. (Up to 99 days per year.) -4 Hour Setback Override Timer adjustable in 30 min. increments -Energy Saving Smart Fan - With the fan on continuously, fan runs only in occupied periods or when the system calls for heating or cooling in unoccupied periods -3 Security Levels with adjustable setpoint limiting -Thermostat Locking - Set points can only be adjusted by authorized individuals if this feature is on -Thermoglow Continuously Lit Electro-luminous Display -Display shows both heating and cooling setpoints and room temperature simultaneously -Maintains temperature to within 1° of setpoint -Adjustable deadband - can be adjusted form 1 to 6 degrees -Temperature sensor calibration -No batteries required, stat retains correct time for up to 48 hours in case of power failure -All programming and setpoints stored in non-volatile memory, and are never lost in power failure -Service filter indicator (adjustable 200 to 1950 hours) -Red/Green LED shows whether thermostat is calling for Heating or Cooling -5 minute compressor time guard and adjustable cycle limit, both overrideable for servicing equipment