One ton of refrigeration equals ______ BTU’s?

Simple enough question. Most people would answer,12,000. As that is what they learned and were told in the field. Let’s take a closer look at the definition of a *ton of refrigeration.*

**Ton:** the amount of BTU’s required to melt 1 ton 0f ice over a 24 hour period.

It requires 144 BTU’s per pound to melt ice (change the state from solid to liquid, also called * latent heat of fusion*)

one ton equals 2000 pounds,. Therefore, 288,000 btu’s are needed to melt 2000 pounds of ice (2000 lbs. X 144 BTU/lb.

Where does *12,000* come from?

Answer: if it takes 288,000 btu to melt the ton of ice over a period of 24 hours, then one ton equals 12,000 BTU per hour (288,000/24 = 12,000)

The answer is 288,000 BTU’s (the amount of BTU’s required to melt 2000 lbs. of ice). If you answered 12,000 BTU’s ** per hour**, you would be correct.

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