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The Robertshaw 300 Deluxe Programmable thermostats offer state-of-the-art control for commercial and residential applications. Our sleek, flush-to-the-wall design houses feature-laden intelligence. Elegantly Sophisticated This series has it all. The Robertshaw 300 Deluxe Programmable thermostats offer state-of-the-art control for commercial and residential applications. Our sleek, flush-to-the-wall design houses feature-laden intelligence.Standard features include Auto Changeover, Permanent Memory Retention during any type of power outage, 3-Hour Temporary Temperature Override and Smart Fan that allows selectable fan operation for each programming period. Features: • Large LCD – Easy to read display • 3-hour Override Capabilities – Allows temporary adjustment of temperature • EEPROM memory – Electronic memory storage with no batteries to replace • Contemporary design – Fits into any decor • Lockable keypad and front door – Two levels of security against unwanted tampering • O & B terminals on select models – For use with heat pump or controlling dampers and fresh air economizers • Auto changeover on select models – Automatically switches between heating and cooling system to maintain comfort • Compressor short cycle protection – Preserves integrity of HVAC system • Remote sensor capable – Connects to optional remote indoor or outdoor sensors for optimal comfort Specifications: Temperature Setting Ranges: Heating: 38° to 88°F (3° to 31°C) Cooling: 60° to 88°F (16° to 31°C) Temperature Sensing Range: 28° to 124°F (-2° to 51°C) A.C. Current: .050 Amps to 0.75 Amps continuous per output with surges to 3 Amp Max. D.C. Current: 0 Amps to 0.75 Amps continuous per output with surges to 3 Amp Max.