A traditional home-comfort system has two parts: an indoor unit, such as a furnace or air handler, and an outdoor unit. An air conditioner is the outdoor unit that cools air and sends it to the indoor unit to be circulated through your home. The indoor and outdoor units are designed to work together, and when the air conditioner is properly matched with a furnace or air handler, the result is maximum efficiency and extended system life. Air conditioning and cooling efficiency is measured using a Seasonal Energy Efficiency Ratio (SEER). A higher SEER signifies higher energy efficiency.
A home's "split system" central air conditioning system includes a compressor, a fan, condenser coil, evaporator coil and a refrigerant. It extracts heat from indoor air and transfers it outside, leaving the cooled indoor air to be recirculated. The efficiency of central air conditioning systems is rated using SEER ratios. A central air conditioning system uses electricity as its power source.
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