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Appendix G Cooling Tower, System 8

Hi, I'm modeling a cooling tower for the baseline building with E+ 8.5.

The cooling tower must be autosized with 1.15 factor (https://comnet.org/383-cooling-towers). I'm using the object "CoolingTower:TwoSpeed". As I read from the documentation, from the capacity I get the air flow rate, and finally the fan power.

How can I autosize it? Is the field "High speed nominal capacity"? The pont is that it can't be "autosize" if I'm not wrong.

Thank you