The term "AUX heat" typically refers to the auxiliary heating feature found in certain types of air conditioning systems, particularly heat pump systems. Heat pumps are designed to provide both heating and cooling by transferring heat between the indoor and outdoor environments.
In regions with colder climates, heat pumps may struggle to extract sufficient heat from the outdoor air when temperatures drop below a certain threshold. This is because the heat energy available in the outdoor air decreases as the temperature decreases. To overcome this limitation and ensure adequate heating, heat pump systems are equipped with an auxiliary heating system, often referred to as AUX heat.
Here's how AUX heat works and how to use it:
Automatic Activation: When the heat pump detects that it cannot provide enough warmth to meet the desired indoor temperature due to low outdoor temperatures, it automatically activates the auxiliary heating system. This could be electric resistance heaters or a gas furnace, depending on the setup.
Manual Activation: In some cases, you may have the option to manually activate the AUX heat feature. This can be useful when you know the outdoor temperatures are extremely low and you want to ensure maximum heating capability. Check your air conditioning system's manual or consult with an HVAC professional to determine if manual activation is available and how to activate it.
Thermostat Control: The AUX heat is controlled by the thermostat. When the heat pump determines that the auxiliary heating is required, it signals the thermostat to activate the AUX heat. The thermostat then engages the auxiliary heating system to provide additional warmth.
It's important to note that AUX heat consumes more energy compared to the heat pump alone, as it usually relies on electric resistance heating or a gas furnace. Therefore, it's advisable to use the AUX heat feature judiciously and primarily rely on the heat pump for heating when outdoor temperatures are within its effective range.
If you're unsure about the specific operation and usage of the AUX heat feature in your air conditioning system, it's recommended to consult the system's user manual or reach out to a qualified HVAC professional for guidance tailored to your specific equipment.