The full form of EER is Energy Efficiency Ratio.
EER is a rating that measures the cooling efficiency of an air conditioner or heat pump. Specifically, it represents the ratio of cooling output (in British thermal units or BTUs) to the electrical power input (in watts) at a given operating point. Higher EER ratings indicate more efficient cooling performance.
Here's a breakdown of the key aspects:
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Definition: EER quantifies how much cooling an air conditioner provides for each unit of electricity it consumes.
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Calculation:
EER = Cooling Output (BTU/hr) / Electrical Power Input (Watts) -
Significance: A higher EER rating signifies greater energy efficiency, leading to lower electricity bills and reduced environmental impact.
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Comparison with SEER: While EER measures efficiency at a specific operating point (e.g., 95°F outside temperature), SEER (Seasonal Energy Efficiency Ratio) provides a broader measure of efficiency over an entire cooling season. SEER accounts for varying temperatures and operating conditions, making it a more comprehensive indicator for overall cooling performance. SEER ratings are typically higher than EER ratings for the same unit.
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Example: An air conditioner with an EER of 10 provides 10 BTUs of cooling for every watt of electricity it uses. An air conditioner with an EER of 12 is more efficient, providing 12 BTUs of cooling per watt.
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Importance in Purchasing Decisions: EER is an important factor to consider when purchasing an air conditioner, as it directly affects energy consumption and operating costs. Look for higher EER ratings to save money and reduce your carbon footprint.
