That is A/C AND CAP combo.
Guess that combo could generate some heat.
Also note the WP impeller is smaller dia and there are fewer vaines and the fan has wider blades. My guess is that are spinning the fan faster with a wider blade moves a **** ton of air. The smaller impeller and fewer vaines seems like it would push less water so maybe that was their way of keeping water flow about the same but increasing airflow.???
I also found it interesting that the majority were underdriven by 5 percent.
