Emergency Heat (Heat Pump Systems Only); Hybrid Heat; Humidify - Carrier Edge Performance Owner's Manual

COMMON TERMS AND WHERE TO FIND THEM
Emergency heat (heat pump systems and Hybrid Heat systems only)
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You can manually set the thermostat to use emergency heat but it is the most
expensive option. If it's using emergency heat, the display will show Em heat when
you press the mode button.
Hybrid Heat (heat pump with a furnace system only)
This Carrier heating and cooling system concept offers maximum comfort and
economy. When a Hybrid Heat system is installed, the thermostat automatically
controls whether your system delivers heating with the heat pump, with the furnace,
or with both options working together.

Humidify

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When your heating and cooling system includes a humidifier, the thermostat will
instruct it to add moisture to the air as necessary when the heat is on.
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