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British Thermal Units Per Hour (BTU h) and tonnage (ton)12,000 BTU
As per ASHRAE standard
12000BTU/Hr = 1TR
ref. ton is equal to 12000 BTU/ hour
Twelve thousands British thermal units(BTU)
1 refrigeration ton is equal to 12000 BTUs per hour
1 TR = 12000 BTU/HR
hope it will be helpful to you