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hvac history cfm cooling

  1. General HVAC Discussion
    Why is 400 CFM per Ton a standard air flow figure for HVAC? I think it has its roots in the early refrigeration industry (like the fact that it takes 12,000 BTUs of energy to convert 1 Ton of water into ice), but not sure exactly how. Is it the rate at which air needed to be introduced to the 1...