BTU 9000 means how many tr?

To convert BTUs (British Thermal Units) to tons of refrigeration (TR), you can use the conversion factor where 1 ton of refrigeration is equivalent to 12,000 BTUs per hour. Therefore, 9,000 BTUs is approximately 0.75 tons of refrigeration (9,000 BTUs ÷ 12,000 BTUs/ton = 0.75 TR).