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The HVAC System is input as a ducted Gas Fired system with Cooling. This type of system has a maximum fan power limitation of 0.45 w/cfm in cooling mode.
You can either change your system type to something other than a ducted Gas Furnace, or you must go to the System level of the Building Tree and in the HERS tab set this value to 0.45 w/cfm or less.
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