What size air conditioner do I need? There are several metrics you should consider before buying an air conditioner. You have different EER and SEER ratings, power, amperage, voltage, and so on. The most important metric is the cooling capacity (measured in BTU/hr). It denotes the size of your air conditioner. BTU meaning: British Thermal … Continue reading How Many BTU Air Conditioner Do You Need? (+ AC Size Calculator)