

It’s calculated by dividing the total cooling output (in BTUs) over a season by the total energy consumption (in watt-hours) over the same period of time. This formula also helps measure an AC’s efficiency, but considers the unit’s performance over an entire cooling season rather than just a single moment. Here’s the formula:ĮER = Cooling output (in BTUs) / Power Input (in watts) Seasonal Energy Efficiency Ratio (SEER) Formula It’s calculated by dividing the cooling output (in BTUs) by the power input (in watts) of the AC unit. This formula helps measure how efficiently an AC unit uses electricity to cool your home.

The most common ones include: Energy Efficiency Ratio (EER) Formula There are various formulas used to calculate AC costs.
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