Assertion: fan | /r/HasProperty | different sizes
Facets:
value: in order to determine the best size
type: PURPOSE
Source sentences:
text: But how about 2 fans that are different sizes, yet produce the same airflow (CFM)?
text: When you compare two fans that are different sizes yet have the same CFM you will find they produce quite different wind speeds.
text: Although this testing procedure can be valuable for comparing the performance of fans equal in size, it does not emulate a real application inside a home and does not make it easy to compare fans that are different sizes in order to determine the best size fan(s) for any particular application.