Tonnage, COP, EER, SEER, ISEER and Star Rating For Air Conditioners

Heating and cooling

What is TR or Tonnage of Refrigeration: Tonnage of Refrigeration is the unit of measurement of cooling of a refrigeration or Air conditioning system. It is defined as the rate of heat transfer that results in the freezing (or melting) of 1 ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours.  A ton of ice melting over 24 …

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