![]() High-efficiency units typically have two-speed or variable-speed compressors. Any unit with a SEER rating of 17 or above or a SEER2 rating of 16.2 or above is considered high efficiency and will cost more. Central air conditioners will include both a SEER and SEER2 rating for the next several years to help avoid consumer confusion. In 2023, new SEER2 standards were introduced to calculate more accurate ratings. The higher the number, the more efficient the system. This metric represents the amount of cooling power an AC has throughout a typical cooling season divided by the energy it needs to run. Energy EfficiencyĪC efficiency is measured with a SEER rating, which stands for seasonal energy efficiency ratio. Variable-speed compressors are the most efficient because they can run at the lowest possible speed, but they’re also the most expensive at $1,500 to $2,800. Two-stage compressors can run at high or low speed depending on your system’s current cooling needs, and they typically cost between $1,000 and $2,000. One-stage compressors are the most affordable at approximately $250 to $1,000, but they always run at a single high speed so they require more power. ![]() ![]() More sophisticated compressors are more efficient, but they cost more. Compressors are the second-most expensive condenser parts to replace, so the overall cost of AC condenser replacement depends partially on the compressor type. The compressor is the part within the condenser that compresses refrigerant from a gas to a liquid. ![]()
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