Jul 29, 2017 · 1 refrigeration ton = 12,000BTU = 3.5KW P = Electrical power rating of the A/C system = ~2KW C = System capacity = 2.5 tons x 3.5 = 8.57KW Electrical power input 2KW 2.5 tons (8.75KW) of heat is moved from the inside space to the outdoor environment Inside space Outdoor environment Inside spaceOutdoor Cooling Loadenvironment 2.5 tons A/C Sys