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Did you know?

Did you know:

Before refrigeration air conditioning was invented,
cooling was done by saving big blocks of ice. When cooling machines
started to get used, they rated their capacity by the equivalent amount
of ice melted in a day, which is where the term “ton” came from sizing
air conditioning.

A ton of cooling is now defined as delivering
12,000 BTU/hour of cooling. BTU is short for British Thermal Unit (and
is a unit that the British do not use) The BTU is a unit of heating – or
in this case, cooling – energy. It’s more important, however, to keep
in perspective that a window air conditioner is usually less than one
ton. A small home central air conditioner would be about two tons and
a large one about five tons

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