The digital programmable thermostats shall be PROSELECT® model numbers PSTSL11P52 and PSTSL21P52, 3.62” high x 4.72” wide x 1.38” deep, powered independently with either 24 Volt AC or with two “AA” alkaline batteries (3.0 Volt DC). The thermostat shall be compatible with single-stage gas, oil, or electric heating or cooling systems including single-stage heat pumps and 250mv – 750mv millivolt heating systems. The thermostat shall have a bright blue backlight display and a separate sub-base for trouble-free installation. Temperature control range shall be between 45° and 90° F (7° and 32° C), the accuracy of +/- 1° F (+/- .5° C), and humidity range between 5% and 95% relative humidity. The thermostat shall include non-volatile memory to retain user settings, adjustable temperature limits, filter check monitor, adaptive recovery mode (ARM™), and separate heating and cooling set point program times and temperatures. The thermostat shall have low battery indication and a front reset button will return all user and program settings to default values when pressed. The thermostat can be mounted to a horizontal junction box. Meets California Title 24 Guidelines.
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