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If you check the eio file for sizing results, you will find that this coil has a design flow to capacity ratio within the limits used for sizing, 0.00004026 and 0.00006041 m3/s/W (look at the eio results and do the math, air flow divided by capacity).

This warning shows that the "operating" flow to capacity ratio, which as stated in the warning, must be between the values shown in the warning. The question is what is causing the air flow rate to be lower than expected during the simulation.

  • What system type is used
  • What type of terminal units are used
  • Is the overall simulation completely autosized