HONEYWELL Y594G1419/94P11 MULTISTAGE HEAT PUMP THERMOSTAT SUBBASE PACKAGE 24 V CONTROL RANGE 42F TO 88F 2-STAGE HEATING/1-STAGE COOLING HY-HEAT-AUTO-COOL FAN SWITCH:AUTO ON HY-HEAT-AUTO-COOL FAN SWITCH:AUTO ON DIMENSIONS:H 3 5/8" x W 5 5/8" X D 2 1/4"