<div>Hi,<br></div><div><br></div><div>I'm attaching a file which demonstrates something strange I recently discovered. This is a quick wizard generated file with one change - on the first floor, I specified minimum flow requirements as cfm/sf at the zone airflow level for some of the zones. In the baseline model, all airflows are auto-sized, and the actual flows to the spaces are equivalent with the minimum airflows specified.</div>
<div><br></div><div>The parametric run: "Fan Flow specified" specifies the design airflow for the fan for the VAV system on the first floor (the airflow is equal to the auto-sized airflow in the baseline model). The reported design minimum flow rates are the the same as in the baseline model, but a look at the SS-R report shows that for the spaces where the minimum flow rate is specified in cfm/sf instead of minimum flow ratio, the system minimum flow ratio takes over. The spaces where minimum flow is specified as a minimum flow ratio perform as expected.</div>
<div><br></div><div><br></div><div>--</div><div>Karen</div>