Bard HVAC 8403-089 Programmable Thermostat T4

The Bard HVAC 8403-089 Programmable Thermostat T4 is a temperature regulation system that monitors the conditioned space & sends operating commands to connected heating and cooling equipment. It provides heating and cooling control for air-conditioning or heat-pump application with programmable temperature settings. The thermostat supports automatic changeover between heating and cooling modes and includes battery backup for maintaining stored settings in HVAC systems. It works as the user interface for selecting operating modes adjusting temperature setpoints and controlling fan operation.