So if you have a three-ton air conditioner,
and one ton in HVAC parlance equals 12,000 Btus, then that air conditioner can remove
about 36,000 Btus of heat from your home in one hour.
It takes about 12,000 Btus- that's British Thermal Units(one BTU is
the amount of energy needed to heat one pound of water by one degree Fahrenheit)- to melt one ton of ice over the course of 24 hours.