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How a Central Air Conditioner Works

Central air conditioners (central a/c) are typically installed in two parts: the smaller and quieter parts (such as the evaporator) are often installed indoors (perhaps even as part of your warm-air furnace). The louder, heat generating parts (the condenser coil and compressor) are generally installed outdoors.

Responsibilities of the Evaporator Coil

When the temperature in your house starts to rise, warm air is drawn across the evaporator coil. The evaporator coil has a chemical inside, called a refrigerant, which keeps the coil cold. The evaporator coil absorbs the warmth from the air, causing the moisture in the air to condense and drain away. Thus, a central air conditioning system not only reduces the temperature in your house, it also lowers the humidity.

Responsibilities of the Condenser Coil and Compressor

As the evaporator coil absorbs the heat from the surrounding air, it begins to warm up. The heated refigerant is sent to the compressor, which pressurizes it and pushes it through the condenser coil. The condenser coil cools the refrigerant and sends it back to the evaporator coil.

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