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PSG Freedom Classic Non-Programmable Thermostat - 1 Heat / 1 Cool - Model F100 A great American value with Accustat Thermostat Quality! Manufactured by the makers of Accustat Controls - this non-programmable residential thermostat features one-touch economy setting for single stage heating and/or cooling. Compatible with: Single stage heat pump with auxiliary heat Single stage heat pump, no auxiliary heat Single stage cool, single stage heat, conventional cooling, normally open heat valve Single stage cool, single stage heat, conventional and normally closed valves Cool only, single stage compressor Heat only, single stage, normally open heat valve Heat only, single stage, conventional and normally closed valves Features: Large easy to read backlit display Dual-power - battery (2 AA) or 24V hardwire Manufactured by the makers of ACCUSTAT® controls Flexible applications One touch ECON button automatically sets thermostat back to economy setpoints - press it before you go to bed or leave for work Armchair programming - set parameters before attaching thermostat to wallplate Made in the USA Permanent memory retention Battery backup Low battery indicator Manual or Automatic changeover Freeze protection - If the thermostat is in the OFF mode and the temperature drops below 38°F the freeze protection feature automatically activates the heating system. ServiceWatch - filter, cooling, heating run time monitor - designed to remind the homeowner to schedule service for the HVAC equipment. Selectable separate cycle rate and differential in heating and cooling Programmable password protection Programmable temperature limits 2 year warranty Dimensions: 6" W X 4" H X 1-1/2" D Terminals: Y1, B/O, G, C, RC, RH, W1